Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey, I hope the Question was not asked already ...

When I am active in Raids as Holy Priest it will be fun to heal in PvP sometimes or help as healer in World PvP. Is there a level of Gear where you do not need to farm the PvP sets (rare and epic) anymore, because the T-Set is better than them?
Or is PvP gear needed, because of the high amount of Stamina to have a chance to be not 0.5 second one shot?

On the other hand is there a level of Gear where the PvP gear (rare and epic again) is worse than a T-Set?
Is it even possible to use rare or epic PvP gear Sets, or pieces of them, as pre Raid gear because of the high amount of stamina?

PS: Please report spelling/grammar mistakes, english is second language for me .

Real priests pvp in devout

real priests pvp in ZG set to mc people out quicker

My priest friend was complaining the other day that he felt less sturdy in Truefaith Vestments than the rank 10 robe. I don't know anything about that though, I just cast frost bolt.

anyone got a priest BIS list for PVP? all i can find is PVE carebear shit