Just did a few runs on my 222 alt nin, and the runs went way slower instead of me on my blm, I made sure to use my crappy aoe when it was needed but it just sucks too much, you can do everything right with nin but you will literally, never, ever, match a blm in terms of single target and in terms of aoe, and dungeons/raids are full of trash mobs so why play a class that is useless in 80% of a dungeon or raid. I ran away screaming and put all the gear back on my retainer, nins are good retainers.

That was my investigation, keep in mind nin was my first 60 so I try to like the class but the shortcomings are very glaring.