Believe me, Wall Breaker HPs are fine. Have more than a few people raiding my base, and able to use them quite well. Defences tend to shoot at giants, if given the choice of enemies within range. Wall Breakers tend to be ignored by most defences when there is something else for it to shoot. Also, they deploy their bomb just fast enough at times for them to go off, before defences can react and the shot fired gets to them. Otherwise, the delay in setting the bomb is enough to get shot if by itself, unless deployed point blank on a wall, if deployment that close is possible.

