Topic for this thread: What are some of your favorite Battle Strategies?

I like to have a summoner, a sage, and a fighter. The summoner has summons and only a couple spells, the sage has many magic spells, and the fighter has no magic, only commands and possibly a couple summons. The summoner either uses his/her summons, or uses a physical attack. The sage will use his magic attacks or physical attacks. The fighter will use mostly physical attacks, but may have an Enemy Skill materia, because it doesn't lower strength any. This set-up normally destroys main story bosses, but isn't too amazing for the weapons, because the strategy kind of depends on keeping everyone alive.