IMO it's not good disc pvp spec 3.1: no absolution and mental agility? Your main spells on the arena are instant. You ll bubble all the time- it is instant too. And Renewed Hope is a must. Disc priest will own in 3.1 patch but not with your specc.
Mental agility and imp Flash heal are almost a must-have...and i would seriously consider divine aegis now that it can stack up to 10k dmg
Unless youre using this as a pve disc spec as well..grace and rapture are no longer necessary for a pvp spec
im doing something like this http://talent.mmo-champion.com/?prie...0&version=9767
some points in the holy tree can and probably will be moved around but the disc part is solid
divine aegis isnt good for pvp because the pvp healy gear doesnt have any crit on it, no crit means no shield, grace is awesome to help heal yourself more when you are getting destroyed, and rapture just helps with mana, since the spirit nerf my regen has been terrible and mana is a real problem. renewed hope is definitely a must for the 3% less healing. for me i like reflective shield just because i am the first target and it does a little bit of damage to help out, but thats just a personal preference. only problem i have with the last one is improved fort is a must for the extra 4% stam base and also making the fort even better, as a priest you need all the health you can get. personally i would get blessed recovery instead of divine aegis because of the crit i said earlier, but i dont know how good blessed recovery actually is. sorry if this is very jumpy in thought