-Another technique is to equip everyone with a Terra Elemental, then equip all of your characters with a Elemental-Fire, Ice, Lightning, or Earth magic. After that, just attack Cloud and everyone else in the party. Instead of lowering your HP, you will gain HP.
-Enter an easy battle and cast reflect on your opponents, then cast Cure 3 on your party. It will do Cure 3 the same number of times as there are enemies. Note: It will only do this to the person who casts the Cure 3.