I finally managed to attend a raid (Molten Core) and try out my new spec. All in all, it wasn't much different than my previous spec, save that I hit Crusader Strike whenever I remembered about it.
It's pretty hard to tell if you are actually doing more damage, or if Sanctified Crusader helped. I think it helped, as mobs seemed to die faster, but that may also have been because we are gearing up, or the new specs. I did get a 1K Crusader Strike crit in healing gear, so that's good enough for me.
I really wish I had a meter running for the last few raids, though. I find it hard to actually tell how my damage is changing in raids, mostly because I'm usually paying more attention to the raid's health than to my character. Actually quantifying the change would have been a good idea.
Spiritual Attunement is awesome. I was not running out of mana at all. I even switched to healing with Holy Light for most (non-ranged) fights, and I didn't really have issues with mana.
Actually, healing was kind of weird in this raid. Perhaps it was the HoTs stacking, but health bars seemed to change in a different fashion than normal. Normally, they fall and increase in visible chunks, and in this raid they seemed to be a lot more stable. For example, a rogue would drop to 75% and I'd Flash of Light her, expecting another priest to drop a Flash Heal or something. However, the Flash Heal never really came, but her health would not drop further, maybe even increase a few percentage points, but not a great deal for the rest of the fight.
I think the priests and druids were using HoTs more heavily, resulting in a different rate-of-change for health bars than I am used to. It was oddly disconcerting. I switched to mainly casting Holy Light every so often, with longer intervals between casts. It seemed like a good strategy, especially with the mana provided from Spiritual Attunement.
The lack of decursive was amusing. I'm out of practice, but it's not too bad, especially since I use sRaidFrames, which dims people who are out of range to you. The one thing we need to work on is tunnel vision. For example, on the Sulfuron Harbinger fight, we were concentrating so much on keeping the tanks cleansed that I think a couple of priests died from DoTs. But so far it doesn't seem that bad.
I am thinking about trying a click-cast mod, and binding Cleanse to my right mouse buttons so I just have to right-click the correct frame. Of course, most mods seem to be in a state of flux at the moment, so I may have to wait a few days.
Hopefully, I'll be able to give this spec a whirl in Blackwing Lair sometime soon. I should also find a decent damage meter so I can actually quantify performance.