DPSing as a healer is not about saving time, it's about having fun and not resting my head on one hand while I press a key every 2 seconds like most WHM I see. Or just auto-follow a random party member and let the fairy do all the work while I go shopping for groceries (SCH version). What's the point of playing a game just to die of boredom ?
Pretty much what's already been said. Stonesking, Eye for an Eye (if I know the next pull will be bigger then the current one, like the one after the crabs in Keeper of the Lake, then I save it), gauge how fast the tank drops, see if the DPS are stupid and eat every cleave/AOE (the temptation to let them die and show them ho it's done is hard to resist), which means I'll be forced to heal more then necessary, Divine Seal + Regen (refreshed before Divine Seal drops), Virus the hardest-hitting enemy (or a random one) then Holy Spam with Presence of Mind. I've only recently started using Fluid Aura after Aero in boss fights (like Fester after Bio or Ruin²), against ennemies immune to knockback (colossi in Keeper of the Lake,...), or as a finishing blow against a normal enemy.
Maybe I'll test if the added Regen of Medica II helps in bigger pulls, but it will most likely mean unneeded enmity generation. And it makes me cringe when I see another healer use Medica II at the start of a pull. Medica II =/= Succor.
