How to deal with the drill mech?

[tetleytea]

I beat Driller with no loss by using Berserker. My Berserked pallies were doing 10k a pop. Whenever you knock him into the next phase he won't retaliate, plus the next turn you know he's going to do the tunnel collapsing thing. Just make sure your ranged units aren't in those slots and he basically wastes that turn on nothing. A lvl 2 Dispel on my pallies, and the only thing I had to resurrect was the pallies themselves.

[DGDobrev]

That is a good tactic for normal difficulty, well done The problem is that on impossible difficulty the boss has a total of 98K hp (1+2+3 position) and using 1 tank +4 ranged units will make them prone to a gun shot (which is the highest chance attack for the boss if there are 2 units in the same line), which is highly undesirable...