One of my (three) priests is nearing 90. Another is 85
Main spec Holy for the first, disc for the second's OS. I have no plans of raiding (maybe, possibly, if the mood strikes, an LFR here or there). I DO do 5-mans on them, though. Possibly some PvP on the 85, if I ever actually get around to leveling her.
Looking at noxxic.com and the level 90 talent, they recommend Cascade for both. But that seems...less than ideal in a 5-man situation? I was thinking more Halo for fives...
What does wow_ladies say? What do you use? For both fives, and pvp healing.