Dragoons are probably the best way to break the damage limit and get the maximum damage record, what with Jump and elemental lances' crazy multipliers (DS version of course).

My end-game party consisted of Refia (Knight), Luneth (Sage), Ingus (Ninja), and Arc (Devout, White Mage Kitty power, etc.). Next time I want to try out Vikings and Bards (power buffs), and more than likely a Dragoon. I don't know if I'll steal the Gungnir though since that apparently requires a very high Thief job level.