Command an Army All Units Guide — Best Skill Trees 2026

The Mongol update completely changed how you build your army in Command an Army, and now every unit has its own skill tree that can make or break your battles. If you want to get the most out of Command an Army all units, you need to understand which skill paths actually matter for each troop type. This guide breaks down the best skill tree builds for every unit, explains how skill crystals work, and covers the new evolutions that are dominating ranked matches right now.

Whether you are running Lancers for hit-and-run tactics or stacking Spartans for an impenetrable defense, picking the wrong skills wastes your limited skill crystals. Let's fix that.

Helpful resources: tier list, beginner guide, and comprehensive guide.

How the Skill Tree System Works in Command an Army

The skill tree system arrived alongside the Mongol battle pass, and it fundamentally changes unit progression. Each unit has its own dedicated skill tree, which means skills are bound to that specific unit — you cannot transfer them.

Skill crystals are the currency here, and they are far rarer than gems. You earn them through:

• Daily quests and weekly quests
• Ranked wins (higher ranks give more)
• Battle pass rewards
• Redeemable codes like SKILLTREE (five crystals) and MONGOLS (two crystals plus 1,000 gems)

According to community reports, skill crystals are intentionally scarce to force players into making strategic choices. You cannot unlock every node on a single unit's tree, so you have to commit to a build that matches your playstyle.

Can You Reset Skill Trees?

Yes, but it costs 5,000 gems per reset. That is expensive, especially for newer players. The good news is that resetting refunds all your spent skill crystals, so you do not lose them permanently — you just pay the gem fee to reallocate.

Player experience suggests waiting until a unit reaches its final evolution or ascension before investing crystals. If you spend crystals on a mid-tier unit and then evolve it, those skills may not carry over properly.

Final Skills Are Mutually Exclusive

Every skill tree has red "final" nodes at the top. You can only pick one. This is the single most important decision for each unit. For example, a Trampler Lancer can choose between Stampede (rush damage), Warhorse (rush cooldown), Wild Hunt (rush speed), or Heavy Armor. You cannot have all of them.

Best Skill Tree Builds for Every Unit Type

Here is where the real strategy begins. Each unit serves a specific battlefield role, and your skill choices should reinforce that role — not fight against it.

Lancers: Go Fast or Go Home

Lancers are built for rushing, not tanking. Building armor on a Lancer is a waste because they are not designed to hold a line. The community consensus points to two viable final skills:

Most experienced players choose Wild Hunt because Lancers already have a long rush cooldown. The extra speed lets you close gaps faster, hit the backline, and retreat before reinforcements arrive. The HP penalty is negligible since Lancers should never be standing still anyway.

Spartans: Built to Hold the Line

Spartans are your defensive anchors. Their skill tree focuses on blocking, knockback resistance, and guard break recovery. The best final skill for most players is:

• Bulwark — +10% block, 50% less knockback, reduced speed

The knockback reduction is critical for maintaining formation during turtle defense. Speed does not matter when you are holding a capture point. Faster guard break recovery is also valuable, especially against Halberdiers who specialize in breaking shields.

Archers: Precision vs. Volume

Archers have some of the most interesting skill tree options. The key choices are:

Heartseeker is widely considered the strongest option for raw damage output. Storm of Arrows works well on units with low base attack speed because the penalty matters less. Javeliners benefit most from Long Shot since they already capitalize on ranged chip damage.

Laestrygonians and Berserkers: Damage Above All

These heavy hitters share similar skill trees with options like:

• Bloodlust — +5% damage and attack speed for 10 seconds after attacking
• Warlord's Swing — hits one additional nearby enemy for 10% damage
• Executioner — +8% damage to units below a health threshold

Executioner is the top pick for Laestrygonians because their cleave already hits multiple enemies. Getting bonus damage on low-health targets means more kills and faster snowballing in team fights.

For Berserkers, Bloodlust synergizes with their aggressive nature. The 10-second window resets when they stop attacking, so keeping them in combat is key.

Knights and Cavalry: Last Stand or Executioner

Knights have larger unit counts than Laestrygonians, which makes Last Stand more valuable. The skill activates when your unit drops below 50% troops, giving a damage and attack speed boost. With more models per unit, you hit that threshold more reliably.

Executioner is also viable if you want consistent damage output rather than a comeback mechanic.

Spear Vanguards and Pikemen Evolutions

The new Fallen Knight evolution (from Pikeman) has access to similar defensive skills as Spartans. Faster guard break recovery and block bonuses are the priority here. Community testing shows Fallen Knights are exceptionally strong at defending choke points thanks to their 25 range and block capability.

New Mongol Update Units: Morningstar and Fallen Knight

The Mongol update introduced two evolutions that are currently dominating ranked:

Morningstar units shred shields and have surprisingly high damage for a zero-level unit. Fallen Knights combine the reach of Pikemen with blocking, making them effective against both cavalry and infantry.

The Laestrygonian Golem is the new five-star unit, but its 0.01% summon rate (0.03% with Super Luck Potion) makes it extremely rare. Based on player experience, it hits hard but attacks slowly every 3 seconds, so it is not as broken as the initial hype suggested.

Skill Crystal Farming: How to Get More Without Spending

Skill crystals are the bottleneck for every player. Here is how to maximize your income:

1. Complete daily quests every day — this is your most consistent source
2. Push ranked wins — higher ranks reward more crystals per win
3. Redeem active codes — SKILLTREE gives five crystals for free
4. Grind the battle pass — level 50 rewards include crystal bundles
5. Join the official Discord — codes are often posted there first

Do not waste crystals on units you are not committed to using. If you are still experimenting with team compositions, hold your crystals until you find a unit that fits your strategy.

Common Skill Tree Mistakes to Avoid

Even experienced players make these errors:

• Building armor on Lancers — they are not tanks, and the armor stat does not compensate for their low base HP
• Spending crystals before final evolution — skills may not transfer properly
• Choosing Heavy Armor on any rush unit — the opportunity cost is too high
• Ignoring guard break recovery on shield units — this stat wins defensive battles
• Unlocking multiple final skills — you cannot, so plan ahead

One player noted that they wasted crystals on a Mermaidon before realizing the skills would be removed upon ascension. Learn from their mistake.

How to Test Your Builds Effectively

Before committing 5,000 gems to a reset, test your build in casual mode. Look for these indicators:

• Lancers: Can you consistently hit backline archers and escape?
• Spartans: Does your formation hold against Halberdier charges?
• Archers: Are you getting value from your final skill every fight?
• Heavy infantry: Are you winning 1v1 matchups against similar units?

If a build underperforms in casual, it will definitely underperform in ranked. Adjust before you invest more crystals.

Quick Reference: Best Final Skills by Unit

This table reflects current community consensus as of October 2026. Balance patches may shift these recommendations.

Final Thoughts on Building Command an Army All Units

The skill tree system rewards planning and punishes impulsive spending. With skill crystals being so scarce, every choice matters. Focus on your core units first — typically one cavalry, one infantry, and one ranged — and build them to complement each other.

The Mongol update units like Morningstar and Fallen Knight are currently overtuned, so if you have them, investing crystals there is a safe bet. For everyone else, Wild Hunt Lancers and Bulwark Spartans remain the most reliable builds in the game.