I think it looks good. and Enhance should take it for PVP.

But the problem with enhances or rets (WOG healing) is that if you get to hit you win anyway without healing. When you need the healing (losing), you can't hit ! So you can have all the healing potential in the world, and can't use it. This is more on the arena side.

In world pvp or BGs, this healing is good for consecutive killing blows. Finish this group, recover with instant heals, and move onto the next group.