In my personal opinion, ninjas are a waste of time. Unless your main is a ninja and fully supped up it's not gonna be that good, and even if it is it wont be as good as fully supped up other classes. For WoE all the basic classes have there use, the only thing I've seen a TK, or a ninja or gunslinger useful in WoE...GS has some disarms and they have shotgun frenzy, ninjas have that fire move that can kind of help pre-cast and TK's can jump.
