We have the same parties for VI (sometimes swap Terra for Locke when I need more magic) and IX (Amarant's healing move is great for keeping Garnet ready to summon constantly)! VIII I tend to Squall, Quistis, Zell, and XIII I liked Ladies' Night of Light, Fang, Vanille (OT3 yes.)

X because I am a powermonger I just use everyone in every battle.