In my last Light and How to Swing It, I covered some good enchants for the upper part of an endgame healing paladin -- the head, shoulders, cloak, chest and bracers. Now it's time to head below the belt (har) and take care of hand, ring, leg, foot, weapon and shield enhancements. Okay, hands and rings aren't technically below the blt, but I ran out of room for them last time.
Major Healing: As a holy paladin, you're all about healing. Whether you focus on PVE or PVP, more raw plus healing is always an excellent choice. The only drawback here is that the mats are pretty pricey. 9/10 PVE, 9/10 PVP.
Blasting: It doesn't sound like a paladin enchant, but Blasting is an inexpensive alternative to Major Healing for healadins. Spell crit isn't quite as good as it used to be, due to the Illumination nerf, but it's still useful -- particularly if your gear lacks crit.