To beat the game as easy as possible, you will need at least three players. Two people should take either clavats, or lilties, and one should take a Yuke. The clavat and/or liltie(s) should just pound away at every enemy, while the yuke uses fire to make the enemy more volnerable to attacks, also equip the yuke with cure and life to keep the other players alive. The yuke should also stay a safe distance from the fights, and carry the chalice at all times, so the high attack players can always be ready for battle. If you have enough command slots, equipping clear isn't a bad idea either.