Due to boredom of playing full Pyro and AP, I've been messing with 0/23/18 for the last few weeks with 4-piece Combat Tech set bonus.
I won't say that this spec is better than full Pyro or AP, because it is not, and I wouldn't use it in ranked WZs. But it is loads of fun to play around with in normal WZs, I tend to do around the same overall damage as I do in full Pyro spec (although obviously with less burst), in return for extra mobility and survival.