The main hazard of the dungeon are Lock-on Mines. Only Mine Sweeper monsters will be able to deal with them. If they explode, they will deal up to 15000 damage per monster. Have at least 2 Mine Sweeper monsters The Gaias will shoot Ability Lock Arrows towards the direction of their cooldown number. If your monsters get Ability Locked, they will not be able to deal with the Lock-on Mines. Make sure you avoid the Arrows while attacking the enemy.