Easily my favorite party. The two fighters can demolish anything your party comes across with little effort. For times when you want to kill everything at once, the Red can use magic. Your party overall has much higher defense and HP than it would with a party with a Thief and/or Black Mage, plus you have four healers (after the class change anyway). The only drawbacks are a slight lack of black magic (10 spells you can't learn, 8 of which are the useless instant death spells) - the only good spell you lose is Nuke, but the two Fighters can do just as much damage if you're only fighting one enemy. The party is also incredibly expensive, but unless you're using BBs, then money is going to be a problem anyway.