Post by groa
is the build I'm currently using, and I find it to be working extremely well for me. I used to be specced for Blessed Resiliance, but I'm doing a lot better with my current Disc build.
I've never found Blessed Recovery to be worth the points, and the amount of BGs I do I get much more from Imp. Healing. Improved PW:S imo is not worth the points (my 1 point is there for lack of a better place to put it), and if you're going to do arenas, Silent Resolve is almost a must imo. The more purges/dispells they cast on you to get rid of your buffs the better, plus it bumps Pain Supression to 85% dispell resistance.
Imp. Divine Spirit is a waste imo, since like Kelgrim said, the only spirit you'll have is your base spirit and from the buff itself if you're in all PvP gear. For me Imp. DS only boosted my healing by about 25-30, so it's waste of 2 points, better spent elsewhere. I keep DS so it takes more purges/dispells to take away all my buffs. Focused Power is a must for the arena, a quick Inner Focus+Mass Dispel when that pally pops his bubble can turn the tide of a fight rather quickly. I'd dump Reflective Shield, and put those in Silent Resolve, never found the damage from the reflection to be worth 5 points. I do see a lot of builds with the Imp. PW:S/Reflective Shield combo though, so I guess it's a personal thing.
As for Holy, Holy Nova seems to be a person-by-person talent. I love it for using Rank1 to pop stealthers and kill snake traps, and I use the highest rank to gill GY guards in AV. xD Holy Reach seems rather useless if you don't have Holy Nova, since you won't be casting many Smites/Holy Fires or Prayer of Healings in the arena, or ever in PvP, you'd almost always spend that time better by casting Mana Burns.