OOOOOORFL!
I guess it's a matter of preference. The Ninja's useful if you use Saber on himself and Temper on other characters. All I know is as long as you have a Fighter, then you're pretty much good. I do know I'm particularly fond of the regular party type Fighter, Red Mage, White Mage, and Black Mage... Because of these... stories and such behind them with roleplaying and jazz.
On a different note, the Yeti being in place of words is a censor correct? I just want to make sure I'm not going crazy. :P