I like Sage so far, pretty quick and mobile, dealing damage is something you should do as a healer too. Especially White mage got some powerful damaging skills, like Holy stuns and regens on big pulls. I had a whm in a dungeon that only used Cure 1 and Medica 2 in lvl 81 - 89 dungeons, was annoying since i had to run from mobs to stay alive. He didn't even use a single regen or Holy.