dunno but 31/0/45 seems good to me , trading some dmg for PI , i even calculated mastery loss it turns out you are losing 1 % dmg 1%crit and some % to gain shadow orb and dispersion but you get pi cheaper instants more mana , reflective , barrier and some fillers... the dps loss shouldnt be that great . we need new spreadsheets : \ hit from spirit is ridiculous and i dunno how much dmg you lose from twisted faith tho you retain a % from glyph of mind flay... smn test this plox :P
spec:
http://www.wowtal.com/#k=QsfkFcVQ_4aJM7.9gq.priest
yeah i know ... dont start on me i was trying to get the missing "POP ALL YOUR CDS NAO" cooldown we never had ... cause shadowfiend is gay cd for dps :P
+ some glyphs are going to change so we gotta w8