I have fun on my alt disc priest in LFR and keep wondering about the proper use of renew and Prayer of Mending.
I generally shield the tank and use penance when it falls off. In between, I atonement heal unless there is a period of heavy damage. If it is heavy tank damage, I'll use greater heal if there is time or flash heal in desperation. If it's heavy raid damage, I'll spam PoH, with SS if I can predict it in advance.
However, I've read some guides that recommend casting prayer of mending on cooldown and also keeping up renew on the tank. I can easily work this into my play style - is it a good idea or would I be better off just doing more atonement? I've noticed my shield often falls off the tank quickly and penance does not fill the whole gap. While it's not a serious gap (if it were, I'd switch to GH or FH), I can see PoM - especially if glyphed - and renew helping fill it.
I guess it does not matter so much in LFR, as with 5 other healers, going either way is unlikely to make much difference: they provide enough general healing to keep the tank up between my shield/penance. But I'd like to build up good habits in case I ever get to heal a normal 10 man raid, when more would be resting on me personally.
Sorry if this is a silly question - I'm still getting used to what seems to be a large toolbox of spells.