"Army slots" are the bottom 3 slots in each build. They are awarded from successful dungeon completions and every leader has a distinct pool of options. Each slot can be changed after unlocking by spending Arclight Energy.
Summary
When you are a buzzsaw, all your problems look like trees.
Leader Ability
Sneed Before Greed
Gain 2 Gold when a unit destroys a Tower, captures a Meeting Stone, or opens a Chest.
Traits
Tank
Armored
Siege Damage
Melee
AoE
Possible Army Slots
Talents
Mine Is Money, Friend!
Gain the Miner trait.
Lead with Greed
Gain an additional +2 Gold when Sneed triggers Sneed Before Greed.
Land Grab
Gain a level whenever Sneed Before Greed triggers.
Recommended Build