Thread: Stuck on Armor of the Dead & Gatehouse Battle stages

Currently stuck on Armor of the Dead & Gatehouse Battle. The large and heavily armored units are destroying me. I can keep farming Tower Overwatch but from what I've seen so far leveling doesn't make much of a difference.

My main team is:


Any pointers would be appreciated. The guides I've read have listed what not to do (sacrifice silver units/CC before 50) and where to level, but haven't mentioned much in the way of how to get over the hump to the point where I can start clearing events and getting better units.