Oh dear, you seem to have forgotten.

Geomancy Paravir. Dual Wield Illusion Magic Sage. Concentrate Assassin. Charge Fusilier. Dual Wield Sword Magic Quad Cut Freelancer.

Mixing and matching can produce absolutely absurd combinations that just utterly crush anything that gets in their path... which is exactly why it shouldn't be in a multiplayer game. I appreciate your love for the systems in FFV, FFT, FFTA, FFTA2, and the Bravely series. But cross class systems like that would break the hell out of the game.