I'd go into an in depth guide about how to spec/gear/gem/reforge etc. If I felt that it would be viable for a decent amount of time. Seeing Blizz changes things on a moments notice sometimes and since a lot of that has been happening lately I ask that you just armory me and copy my setup if you want to give this a try!
The only insight that may not be obvious when looking at my armory is that you don't need that extra 1% PvP Power that most Paladins have in PvP right now because your SP from both PvE Trinkets mixed with Mastery Absorb and using Sacred Shield along side that makes up for the 1% out right healing. No, I can't show the math but it's too obvious in game play.