Vorph
Silver Baronet of the Realm
Mindbender - Trivial content in which mana is not an issue at all, or content that is so healing-intensive that you literally cannot spare a GCD every 10 seconds to cast PW:Sol.Is the mana gain that much better with PW:S vorph? ive been using the mindbender talent~
PW:Sol - Everything in between those two extremes.
(Note that in the trivial case Mindbender is only better than PW:Sol if you're still casting Holy Fire on cooldown. It's got nothing to do with mana or healing, just adding some dps to the raid. You'd fill empty GCDs with SW and Smite in that situation too.)
Also, when forced to play Holy because there's already a Disc in the raid, I choose Surge of Light on that tier. Mindbender is something I pretty much only use in heroics or when soloing old raids.