Zidane - obv
Steiner - brute strength
Eiko - far superior WM to Garnet
Quina - Quina is just ace, and has some great eat abilities

I draft the others in occasionally, but that's my usual line up. I swapped Quina for Amarant on Ozma for his return magic. I;m not a great magic user either, which is why I rarely use Vivi. Freya was only really good for Rei's Wind...