Dire Maul is the BEST dungeon to promote the minis slot, because of the mechanics of this dungeon, you can challenge and pass it with lower-level minis.

Boss 1

The easiest boss.

  1. The enemies and boss will be mad and attack each others if their life lower than 50%. So use Execute and AOE minis to let them fight each other.
  2. Try to use dark iron miner to control the mines.

Boss 2

Maybe the most difficult boss in Dire Maul.

  1. Be careful of Banshee.
    Some units can kill the Banshee instantly: Stonehoof Tauren, Darkspear Troll, Defias Bandits, etc. Use them to kill the Banshee walk alone.
    Sacrifice cheap troops or kobold in an emergency.
  2. Choose wisely location to deploy minis, or them will be killed by the explode.

Boss 3

The key is killing the Orc Mage.

  1. Destroy to tower -> defeat the right side -> defeat the left side:
    The ideal situation is the right side blood elf mage will attract attention of the boss, so the left side team can push the orc mage quickly
  2. Control the mine, you may need a lot of gold to keep the pressure.
  3. Use Execute and unbound minis kill the orc mage ASAP.