I liked me some mystic knight x2 caller white wizard action for a long time.

The mystic knights are pretty much sufficient for killing just about anything, so the two mages are on the whole, superfluous, but whitey had some nice offensive aero2 he pulled out (not to mention haste and cure4), and I just like summoners

(I switched to mystic knight x2 shaman warlock when I got those, but like leeza, the black magic just didn't impress me much. I liked Bio though)