Mass Dispel

This is a little on the costly side to be using in most PvP scenarios, but one can see the benefits it would bring in raids with AE debuffs being tossed around.

Binding Heal

This won’t be your main healing spell, but there are cases where its more useful than the other heals. It’s a handy little addition to the priest’s arsenal.

Prayer of Mending

You can use this basically as an instant flash heal. It’s pretty great in PvP, but good in PvE as well. You can cast it on yourself.

Shadow Word:Death

This works great as a finisher when soloing or PvPing. It’s more difficult to time the moment a mob dies in groups and raids, so it sees less use in those situations.

Shadowfiend

Another really nice addition. The amount of mana the shadowfiend restores is dependant on how much +damage you have. He will typically restore a lot more to a shadow priest than to a holy one. It is easily killed, but its instant cast and low mana cost (or should I say high mana restoration?) more than make up for that.