Healer and heal spell are perfect as is
The problem lies in wall jumping hogs. I have spent millions and millions of coin on wall and too many times I've watched my incredible base be whipped out by hogs. I have a maxed TH 8 base and I mean maxed! Traps, troops, barb king, pumps, drill and mines...literally maxed. I think make a limit on the number of walls a hog can hop, or if a hog rider is damaged more than 50% make him loose his pig so hes just a guy with a hammer then...loosing his ability to jump walls.