I actually programmed Kaz to be a jack of all trades-both a warrior and a mage. It worked out pretty well. He played as my secondary spellcaster behind Mari, since I made Lina more of an attacker, along with D.
-Darkfire545 (D5) :D
I think the first / only time I've been through the entire game, I've made everyone balanced and I added to whatever stat was the lowest. However, since then, I was noticing that Kaz is stronger in ATK than MAG and I've been experimenting a lot more.