Inside Abyssea : Cure V, VI
Outside Cure 3-5
You need to actually be smart at WHM to effectivly use Cure 4, it's very MP effeicent if you put more -Enimity in it then other cures, it's used for when you don't have enough MP to warrent a Cure V but cure 3 will not be enough. Never once have i grabed hate using cure IV when i needed, unless the tank was just incredibly dumb.