There was a thread over on the WoW Priest forums talking about healing rotations/priorities as holy. I can't find the post now (of course), but a few people mentioned using PW:S on tanks prior to pulling. I initially tried doing this when I swapped from Disc to Holy, but it seemed like after the increased mana cost that I was just going OOM constantly trying to keep a shield up on the tank and then drop heals as well. Now I don't even pre-shield anymore, I just hit the tank with a POM, pop Chakra, and wait to drop Renew + Heals to get into HW:Serenity.
Am I right in thinking that pre-shielding as holy now is somewhat... pointless? Or should I look back into incorporating it into my rotations now that my gear's improved a bit?