There should be a new dark elixir troop that specifically targets Townhalls. The unit should be much like a goblin, weak singularly but strong in numbers and should take up only 1 space in army camps. This unit will be great when there is a path to the TH already made and there is little to no traps or defenses left to injure the troop. Also it helps when the heroes go off to the side away from the TH when there is a path cleared.