Anything can be tweaked to a killing machine in this game (hell its half the fun in the system) but I'm with others on the fact that Ninja's are only good for getting Dual Wield and to a lesser extent, Vanish and Reflexes, but overall I feel their are better classes suited for its abilities, especially when Mana Shield fails cause the AI decides that character needs to die NOW!

I actually like Samurai and at high levels they are pretty good with the right set up but like Ninja's they are more useful for abilities than as a class. I just feel Ninjas are not so great as a class cause they have apparent flaws and even with a good set up it can't keep them safe like other classes with a similar set up. All Ninjas really have going for them is speed. Their weapons are not really good compared to Greatswords and Katanas.