basically, when you dont need to heal keep your dot up, if you dont need your dot to be refreshed, you need to use stone/glare, ruin/broil, malefic or your aoe if its a dungeon with 3 or more mobs alive

use cure 1 until you get cure 2, once you get cure 2, you can forget about cure 1 after about level 40 as its not worth diddly squat with whm's infinite mp and cure's poor potency