this is what i'm currently using, note, i was shadow spec from lvl 1 to 70 and so I'm not the biggest expert on holy/disc talents so any and all help is appreciated.
http://www.worldofwarcraft.com/info/classes/priest/talents.html?505200013050012000000235050030300150530020000000000000000000000
not sure if i'm missing any key talents, just got what I thought would maximize my healing so feel free to suggest any changes you see fit.