Mechanicus 2 AdMech Guide: Cognition & Units

The Adeptus Mechanicus campaign in Mechanicus 2 is harder to play cleanly than the Necron campaign because it is not built around a few durable pieces doing obvious jobs. Your army is a machine: Servitors, Rangers, unit cards, leader skills, Canticles, Requisition, Stratagems, and Vigilance all feed into one another.

If you came from the first Mechanicus, the biggest mistake is treating Cognition as a simple resource you collect and spend later. In Mechanicus 2, the good AdMech turn usually starts before the leader acts. You generate Cognition with the right non-leader unit, spend it through the leader or a key tool, then finish the threat before the board gets away from you.

This guide focuses on the early Adeptus Mechanicus campaign: how to generate Cognition on purpose, how to choose Stratagems without overfilling Vigilance, how unit cards work, and what to prioritize in the Shrine of Knowledge.

The AdMech campaign starts on the war map, but the real difficulty begins when you turn Requisition, unit cards, and leader actions into one clean mission plan.

Direct Answers

Question	Practical answer
Is Adeptus Mechanicus good for beginners?	Yes, but it is the harder first campaign. Necrons are easier to read; AdMech rewards better sequencing.
How do you generate Cognition?	Non-leader units generate it through role-specific actions. Servitors gain Cognition when they take damage. Rangers gain it when they attack from more than 5m away.
Should Servitors go in front?	Often, yes. A Servitor taking controlled damage can protect your leader and generate Cognition for the real play. Do not throw it away for no reason.
How far is Ranger safe distance?	The confirmed trigger is over 5m. Treat Rangers as backline shooters; if you move them too close, you may lose their Cognition value.
Should you take every Stratagem?	No. Early AdMech usually wants one Stratagem, not three. Pick the one that fixes the mission plan.
What happens at max Vigilance?	Additional enemies can spawn during skirmishes. On the early setup screen, the meter is short enough that a +2 choice is already a serious commitment.
Are AdMech units permanent?	Mission units are temporary deployments. You spend Requisition to recruit them for that mission, then rebuild around new cards later.
What should you upgrade first?	Prioritize unlocks that improve future deployment options, then leader tools once you know which Tech-Priest is carrying your plan.

The AdMech Loop: Generate, Spend, Convert

The faction starts making sense once you stop asking, “Which unit is strongest?” and start asking, “Which unit makes the next action better?”

A good AdMech turn usually follows this pattern:

Step	What you do	Why it matters
1	Put a cheap or durable unit where it can safely perform its role.	You need Cognition and board control before the leader commits.
2	Generate Cognition with a role action.	Servitors and Rangers are not just bodies; they are resource engines.
3	Spend Cognition on the action that changes the board.	Movement, leader skills, weapons, or Canticles should solve a specific problem.
4	Remove one important threat.	AdMech is worse when it spreads damage and lets Necrons reset the board.
5	End the turn in a shape that protects the leader.	Your next turn is only strong if the machine stays intact.

That is the difference between playing AdMech as a fragile squad and playing it as a resource engine.

Cognition Generation: The Part You Cannot Hand-Wave

Cognition is the core AdMech mechanic, and the important change in Mechanicus 2 is that it is generated by non-leader units doing the thing their role wants to do.

Do not wait until the leader needs Cognition. Build the turn so your units create it before the leader spends it.

Early Cognition Role Table

Unit / role	Confirmed Cognition trigger	How to use it in real missions	Common failure
Servitor	Gains Cognition when it takes damage.	Put it in the lane where it can absorb a controlled hit, block space, and protect the leader.	Leaving it too far back, so it neither screens nor generates anything.
Skitarii Rangers	Gain Cognition when they attack from over 5m away.	Keep them behind the front line and fire from a stable position instead of chasing kills.	Moving them too close, then wondering why the turn has no Cognition.
Other AdMech units	Check the unit trait before deployment.	Pick units by what they generate, not just their weapon profile.	Treating every card as generic damage.
Leader / Tech-Priest	Spends Cognition rather than being the main early generator.	Let the squad prepare the leader’s big activation.	Activating the leader first and wasting the faction’s setup potential.

Should You Push Servitors Forward?

Yes, but only with a purpose. A Servitor is not a suicide button. It is a cheap front piece that can:

• stand between a Necron and your leader;
• take a hit that generates Cognition;
• block a lane during extraction or defense;
• buy the Ranger line enough time to keep shooting from range.

The correct Servitor play is controlled exposure. Put it where being hit helps your turn. Do not send it so far forward that it dies before the rest of the squad can convert the Cognition into value.

How to Play Rangers for Cognition

Rangers are the opposite lesson. They reward discipline. If a Ranger needs to attack from over 5m away, the practical rule is simple: do not spend the whole turn walking forward just because an enemy is low.

Use this Ranger checklist:

1. Check whether the target can be shot from current range.
2. Move only if the new tile keeps the Ranger outside the 5m danger band.
3. Prefer stable firing lanes over short-range cleanup.
4. Let another unit finish a close enemy if moving the Ranger breaks its Cognition role.
5. If the Ranger cannot safely trigger Cognition this turn, do not build the leader plan around that point.

This is where AdMech feels different from Necrons. Necron units often feel individually powerful. AdMech units are more valuable when they keep the whole turn sequence alive.

Canticles: What to Use Early and When

Canticles are special enhancements granted by your Tech-Priest leader. They are not passive flavor buttons. They are Cognition spends, so the real question is not “Can I use one?” but “Will this Canticle convert the turn into a kill, a safe leader, or a completed objective?”

Early Canticle / Leader Spend Examples

The exact Canticle list changes by Tech-Priest and build, so do not treat this as a full late-game list. These are the early effects worth understanding first:

Early effect / spend	What it does	When to use it	When to skip it
Defensive Canticle	Adds a defensive layer to a selected unit.	Before a unit must hold a lane, body-block, or survive an extraction turn.	After the unit has already taken the dangerous action or is not being targeted.
Energize	Makes the next ranged attack deal more damage.	When a Ranger, leader, or other ranged piece can remove a priority target this round.	If the shot only adds chip damage and leaves the same threat alive.
Control / debuff spend	Some leaders can weaken or stun enemies.	When stopping one enemy activation matters more than dealing raw damage.	If the enemy is already dying this turn.
Scaevola-style damage spend	Scaevola can spend Cognition on stronger offensive effects, including lightning-style attacks later.	When you have generated enough Cognition before activating her and the hit changes the board.	If your squad has not generated Cognition yet; activating first wastes her ceiling.

Canticle Priority Rule

Use Canticles in this order:

1. Prevent mission failure. Keep the leader alive, protect the extraction piece, or block a collapse.
2. Secure a kill that matters. Spend only if the buff turns into a dead threat or a safe route.
3. Enable a planned push. Use it before moving into danger, not after the enemy has already punished you.
4. Do not spend for style. If the Canticle does not change the next enemy turn, save the Cognition.

The beginner mistake is treating Canticles as a generic damage buff. The stronger play is to build the turn backward: decide which enemy or route must be solved, generate the Cognition with Servitors or Rangers, then spend the Canticle immediately before the solving action.

Stratagems and Vigilance: Use a Table, Not a Feeling

At the start of a mission, you can pick up to three Stratagems. Each gives a benefit and increases enemy Vigilance. When Vigilance reaches maximum, additional enemies can spawn during skirmishes.

Stratagems are not free value. They are pre-mission trades: reward now, enemy pressure later.

Early AdMech Stratagem Table

Stratagem	Early effect shown	Vigilance cost shown	When it is worth taking	When to skip it
Prepare	Requisition cost to hire troops reduced by 20%.	+1	Good when you need a slightly larger deployment but want to protect your Requisition pool.	Skip if the mission is easy and you can already afford the clean roster.
Reclaim	+1 Archotech Fragment at the end of the mission.	+2	Worth it when you are confident the mission is controlled and you are pushing Shrine of Knowledge progress.	Skip in unknown, extraction, or already-dangerous missions. +2 is greedy early.
Mobilise	Recruitment capacity increased by 1 for this mission.	+1	Good when one extra cheap body fixes your formation or lets you bring a key card.	Skip if the extra capacity only tempts you to overspend.

How High Is Too High for Vigilance?

Use this rule for early AdMech:

Starting situation	Safe choice	Risky choice	Why
Empty or low Vigilance	One +1 Stratagem	Stacking +2 or multiple picks	You still have room if an event or route choice adds more pressure.
Mission objective is unclear	Zero or one +1 Stratagem	Reclaim + other picks	Unknown objectives can become defense or extraction problems.
You already expect a hard fight	Prepare or Mobilise only if they directly help	Reclaim	Resources do not matter if the extra wave collapses the mission.
Harder/custom settings start you with less margin	Skip greed picks	Anything that pushes near full	Your safe window is smaller before the first skirmish begins.

The early screen makes the lesson clear: Reclaim is the greedy choice. It is not bad, but it is the first Stratagem to cut when you are still learning the campaign.

Requisition: One Chapter, One Rule

Requisition is generated by forge cities early and forge temples later. You spend it to recruit units for mission deployment. Once the mission ends, the temporary units you paid for are gone, so every deployment choice is also a campaign economy choice.

Requisition mistakes do not always punish the current fight. They punish the next mission.

Requisition Spending Framework

Decision	Better early habit	Bad habit
Low-risk mission	Bring a lean roster with one clear plan.	Filling capacity because you can.
Unknown mission	Keep a buffer.	Spending down to comfort.
Expensive card appears	Ask what role it solves.	Buying it because it is higher level.
Servitor available	Use it to screen and generate Cognition.	Ignoring it because it is not flashy.
Ranger available	Keep it at safe range for Cognition.	Moving it forward like a generic shooter.
Extraction / defense expected	Pay for bodies that hold space.	Paying only for damage.

A bigger roster can make the current mission easier, but AdMech does not want comfort buys. It wants enough force to complete the objective while keeping the campaign economy flexible.

Unit Cards: How the Deployment Layer Actually Works

AdMech unit selection is not a normal permanent squad screen. Unit cards are generated for the mission. Each card represents a squad or individual unit, has a Requisition cost, and contributes to recruitment capacity.

Unit cards are temporary mission tools. Pick them by role, cost, and Cognition trigger, not by raw appeal.

The Two-Layer Unit System

Layer	What it means	Practical consequence
Campaign unlock layer	Shrine of Knowledge technologies unlock new units and improve access to stronger versions.	Your long-term upgrades shape what can appear later.
Mission card layer	Only some available cards show up before each mission.	You must adapt the roster to the leader and objective instead of forcing one favorite squad every time.
Recruitment cost layer	Cards cost Requisition.	Stronger cards may weaken your next mission if you overbuy.
Capacity layer	You cannot bring everything.	Sometimes Mobilise is worth taking if +1 capacity completes the plan.

How to Read a Unit Card Quickly

Before buying a card, ask five questions:

1. What Cognition behavior does this unit support?
2. Does it protect the leader or expose the leader?
3. Does it solve the current objective or just add damage?
4. Can I afford it without damaging the next mission?
5. Does my current Tech-Priest actually benefit from this unit?

If you cannot answer at least three of those, the card is probably a comfort pick.

Early Combat: A Better Turn Checklist

AdMech loses early missions when turns happen in the wrong order. Do not open with the leader just because the leader is exciting. Open with the action that creates the best leader activation.

First-Hours Turn Plan

Turn question	Good answer
Who can generate Cognition safely?	Servitor taking a controlled hit, Ranger firing from over 5m, or another trait-based unit action.
Which enemy matters most?	The one that threatens your leader, blocks extraction, or stops your Ranger line from working.
Can I remove it this round?	If yes, spend Cognition and Canticles there. If no, reposition defensively.
Is my leader safe after acting?	If not, the action is probably too greedy.
Am I chasing optional kills?	Stop if the objective is already pointing you toward extraction or survival.

Extraction and Defense: Stop Playing for Cleanup

Some early AdMech missions teach the hardest tactical lesson: the correct play is not always to clear the board. When the objective shifts toward extraction or survival, your job is to preserve the mission-critical unit and leave.

When the mission becomes an extraction problem, switch from damage planning to route control.

Extraction Priority Table

Problem	Correct response
Enemy numbers spike	Fall back toward the objective route.
Leader is exposed	Use bodies, cover, and defensive tools to block the line.
Reinforcements appear	Stop chasing side kills unless they block the path.
A Servitor can body-block	Use it; that is one of the reasons it exists.
A Ranger loses safe distance	Reposition instead of forcing bad Cognition math.
Objective is nearly complete	Finish the mission. Do not farm danger.

This is where old tactics instincts can hurt you. A clean retreat is better than a glorious extra kill that costs the run.

Shrine of Knowledge: Early Upgrade Priorities

After the opening mission, the Shrine of Knowledge starts turning mission rewards into future options. Archotech Fragments are recovered during missions and spent on technologies. Technologies unlock new units and increase the chance of recruiting higher-ranked troops. Forge temples matter because the more forge temples you control, the more technologies you can have.

The Shrine of Knowledge is not just a power menu. It controls future unit access and the quality of your deployment pool.

What to Prioritize First

Priority	Why it is strong early	When to delay it
New unit access	More unit types give you more ways to generate Cognition and solve objectives.	Delay if your Requisition economy cannot support more expensive cards yet.
Higher-ranked troop chance	Better versions can make future mission cards more efficient.	Delay if you are already struggling to afford deployments.
Leader augmentation	Strong when one Tech-Priest is clearly carrying your plan.	Delay if you still do not understand that leader’s role.
Forge temple support	Raises your long-term technology ceiling and resource position.	Delay only if the current mission pressure demands immediate combat help.
Economy stability	Lets you recover from bad deployments and support future rosters.	Delay if you are already comfortable and need a tactical unlock now.

Early Shrine Rule

Do not unlock a flashy technology just because it is available. Unlock the thing that improves your next three missions.

For most players, that means:

1. Fix unit access first.
2. Improve card quality only when you can afford it.
3. Build around one or two leaders you actually use.
4. Expand forge temple control when technology limits start blocking growth.
5. Do not spend fragments without knowing what deployment problem the unlock solves.

Leader Augmentations: Early Names, Roles, and First Picks

Do not spread early augmentation points across every Tech-Priest just because the menu is interesting. Early AdMech works better when each leader has a job and your unit cards support that job.

The Tech-Acquisitor screen shows how leader power is split across weapon, utility, and support branches. Do not buy a branch unless you know what mission problem it solves.

Early Leader Role Table

Leader / role	What the material shows	Early build direction	Practical rule
Videx / Lector-Dogmatis	The opening AdMech mission assigns Videx, and the post-mission screen gives him augmentation points. Early visible options include Restore HP and +20% Requisition points.	Safe first investment: survivability or economy.	If you are still learning, take the option that keeps missions stable before chasing damage.
Scaevola / Tech-Acquisitor	Scaevola is a Cognition-heavy Tech-Priest, and later offensive effects can include lightning-style attacks. The Tech-Acquisitor screen shows multiple weapon and utility branches such as Xenarite Omnissian Axe, Volkite Blaster, and Macrostubber.	Build around Cognition conversion: generate first, then spend on the action that removes or controls a threat.	Do not activate Scaevola first. Let Servitors/Rangers create the resource window, then spend it.
Ranger-support leader setup	Some leader tools make ranged turns stronger.	Preserve firing lanes and over-5m Ranger attacks.	If your leader plan wants ranged damage, do not move Rangers into short range just to finish weak enemies.
Extraction / survival setup	AdMech missions can pivot into protecting the Tech-Priest and leaving.	Defensive tools and HP recovery matter more than flashy damage.	Upgrade for the mission type that is actually killing you.

What to Pick First

If you only have a couple of augmentation points, follow this order:

1. Fix survival first if your Tech-Priest is taking pressure. Restore HP or defensive utility is not boring; it keeps the run alive.
2. Take economy only if you can still clear missions. A +20% Requisition-style pick is excellent when your combat plan is already stable.
3. Take weapon branches when you can feed them Cognition. A damage node is weak if the squad cannot generate the resource before the leader acts.
4. Delay specialist branches until you know the failure point. If you are losing to extraction pressure, build for movement/survival. If you are losing to durable targets, build for burst or control.

This guide should not pretend to be a full Faustinius, Videx, or Scaevola build page. The first-campaign goal is simpler: make one Tech-Priest reliable, then expand the roster once Requisition, unit cards, and Cognition generation are stable.

Common Early Failures and Fixes

Failure	Why it happens	Fix
No Cognition when the leader needs it	You activated the leader before the squad generated resources.	Start the turn with Servitor/Ranger role actions, then spend Cognition on the leader, weapon, or Canticle that solves the board.
Rangers feel weak	You are moving them too close or breaking the over-5m shooting role.	Keep them in backline firing positions; let other units handle close cleanup if moving the Ranger breaks Cognition generation.
Servitors feel useless	You are hiding them instead of using them as controlled screens.	Put one where it can absorb a controlled hit, block a lane, and protect the Tech-Priest without being thrown away.
Vigilance snowballs	You took Reclaim or multiple Stratagems before understanding the mission.	Before the mission, pick one Stratagem at most: Prepare for cheaper deployment, Mobilise if +1 capacity completes the roster, and Reclaim only when the mission looks safe.
Requisition runs thin	You overbought temporary units for comfort.	During unit selection, bring one reliable Cognition generator and one leader-protection piece; buy for role coverage, not maximum deployment.
Mid-fight turns feel scattered	You are attacking the nearest target instead of the target that breaks your plan.	Focus the enemy that threatens the leader, blocks extraction, or stops Rangers from keeping safe distance.
Shrine upgrades feel random	You are chasing cool nodes instead of solving deployment problems.	After the mission, spend Archotech Fragments on future deployment quality, unit access, or a leader tool tied to your main plan.
Extraction missions collapse	You keep playing for kills after the objective changes.	Turn the squad toward the route, use bodies to cover the retreat, and stop farming optional kills once survival becomes the objective.

FAQ

How do you generate Cognition in Mechanicus 2?

Cognition is generated by non-leader units performing role-specific actions. Early examples include Servitors gaining Cognition when they take damage and Skitarii Rangers gaining Cognition when they attack from over 5m away.

Should Servitors take damage on purpose?

Yes, when the hit is controlled and useful. A Servitor can screen your leader, block space, and generate Cognition. Do not sacrifice it if the rest of the turn cannot use the point.

How do Rangers generate Cognition?

Rangers generate Cognition by attacking from over 5m away. Keep them in stable firing positions and avoid moving them too close just to chase a low-health enemy.

What is the best early Stratagem for AdMech?

Prepare is the safest early Stratagem because it lowers Requisition cost with only a small Vigilance increase. Mobilise is good when +1 recruitment capacity completes your roster. Reclaim is greedy because it gives an Archotech Fragment but adds more Vigilance.

Which Canticle should I use first?

Use a defensive Canticle when a unit must hold a lane or survive extraction pressure. Use Energize when the next ranged attack can remove a dangerous target. Do not spend Cognition on a Canticle unless it changes the next enemy turn or completes the objective.

Who is the Tech-Acquisitor?

The Tech-Acquisitor is one of the AdMech leader roles shown on the augmentation screen. Treat it as a Cognition-conversion leader: build the squad to generate Cognition first, then spend it through the Tech-Acquisitor’s weapon or utility branch.

How much Vigilance is too much?

If you are still learning a mission, treat any +2 Vigilance choice as risky. At maximum Vigilance, additional enemies can spawn during skirmishes, so the safe early habit is one +1 Stratagem or none.

Are AdMech units permanent?

No. Mission units are temporary deployments bought with Requisition. You should pick them for the current objective, leader, Cognition plan, and economy position.

What should I upgrade first in the Shrine of Knowledge?

Prioritize unlocks that improve future deployment options: new unit access, better card quality, or a leader tool that supports your main plan. Do not spend Archotech Fragments on a flashy node unless it solves a real mission problem.

Should I start with Adeptus Mechanicus or Necrons?

If you want the easier learning curve, start with Necrons. If you enjoy tactical sequencing and resource planning, AdMech is the more demanding but more rewarding first campaign. For a direct comparison, see the Mechanicus 2 faction choice guide.