Concept: PvP crown that can stay up, keep our group up, and pick the group back up if things get too hot. Got the name from how I tend to lead, no one gets left behind.

Sets:
Monster Sets: Troll King is my first choice; a base +2% healing, and if our group is under 60% health when we heal them, they get a nifty bonus to health regeneration mid-fight.
Chokethorn would be a good alternative, giving us a little bit of magicka regen and the chance to have a big burst heal. We're a little limited in our burst heals here, so this can give us an edge over other NB healers.
Sentinel of Rkugamz works as well, like Troll King, it gives a +2% healing but also can give us some stamina regen when its set ability procs.