I once took a team of Arghpirate, Ahhnold, Venom Demon, Flonne and Seraph Madigant - five elite 2H Rages. They destroyed everyone with ease...except the last boss. Most of them didn't have the stamina to be effective by the third fight. I've found Hit 'n Run Rages to be pretty effective too - and they can last long enough to be useful in the last boss fight. Been a long while since I've tried conquests though...don't like the random prizes.