Ninjas are strong enough as it is if you have a single clue of what you're doing (Final Strike), making them stronger then they currently are would make them too strong (Considering the amount of defensive buffs they have and the attack power of Final Strike).
Just take a look at BG lately, that Bicho Ninja (I think that's the name?) has a high win ratio because he actually cleans teams....XD
![[Image: 14tph6o.png]](http://i46.tinypic.com/14tph6o.png)