I'd take Ninja over any class in FF4 anyday.
The Pros:
+ Using 2 swords
+ Elemental Magic
+ Never get physically touched with Image
+ If all else fails: SMOKE!
+ Throwing (in the immortal words of The Tick) SPOONS!
+ Stright up PIMP!
The Cons:
- Low defense (Thats what Paladin friends & Image are for.)
- Little MP (What? Do you think I actually use anything else besides Image? I'm not worried.)
- Semi-low health ( Again, that's what do-gooder Paladins & trusty ol' Image are for...)