2 months ago (Pre-release)
on nostalrius when i rolled with my world pvp guild, i specced into smite/holy damage spec. it was awesome. my smites hit for quite a bit, holy nova did really well, and holy fire did great damage. the nice thing about it too was i could instantly switch over to healing when the moment required it and still heal very well. in shadow you were stuck in shadow form. yeah and of course you could leave shadow form and start healing but it costs mana to switch out and your healing is obviously not as powerful/efficient. you can go pretty far in the discipline tree and get improved POW and imp mana burn.
also, i played in large groups raiding alliance cities and towns, there was always a plan and a leader calling out shots (voroshilov of the red dawn). solo pvp it was definitely different gameplay and it was definitely harder.
now on retail i'm gonna be playing with Kor Kron Vanguard, which is the next evolved form of red dawn on nostalrius. i've been playing with them since elysium and we're super serious about destroying the alliance in glorious world pvp combat. for them i will definitely be rolling a priest to go holy dps spec.
i recommend trying it out if you're into pvp as a priest!