It's really amusing to see people saying that ninjas can keep up their max dps at anytime, or that bad ninjas do about the same damage as good ninjas or that they're easier to use than monks... Obviously these people have never done a serious fight as ninja, otherwise they would know that keeping up the same dps you do on a dummy is practically IMPOSSIBLE.

On fights like T9 there are lots and lots of things that you have to keep into consideration, especially when ninja is the only melee that doesn't have a fixed rotation, and the minimal error can lead you to a massive dps drop: did you use dancing edge, suiton, trick attack or kassatsu right before the boss disappeared? Or did you not reapply dots in time before having to deal with other mechanics? Or did you invert the order of the combos because you forgot which debuffs/dots were still on the boss when you started attacking again? Or did you mess up a ninjutsu because of the lag? Oh too bad, you lose 30% or more of your dps.

...And guess what? Even if you somehow manage to do everything right, good monks will still do more dps than you.