are there any wardens doing melee and actually using this? or do wardens have an utterly useless epic 2.0 spell.....
It's useful in conjunction with the ethrealist Feedback Loop ascension. Aside from that... it's garbage.
You get waaaaaay more damage from keeping clearwater current (with the damage proc) up on 3 people than from Nature's Grace.
Heal, hit combat arts, hit ascessions.. Keeping clearwater on 3 characters takes a bunch of time. Clearwater ascension, CA or heal rinse and repeat. Without feedback loop, the 'bonus' damage you get from Nature's Grace doesn't make up for the Clearwaters you're not hitting for it's duration.
Since Natures Grace and Howling with the Pack are on the same cooldown and have the same duration,I use them in conjunction and don't have to heal during the time. Nice during VC. As I said it's a fairly nice buff. You don't have to use it if you prefer your clearwater playstyle.
I don't use clearwater primarily for healing.. I use it primarily for the dps from the damage shield. Since nearly all named mobs have a constant 3 sec (some more often) non-blockable AoE, anybody you put clearwater on is going to take damage.. and hence proc damage.. put it on your tank and anybody taking extra hits and the damage will proc up even faster.
As I said, if you prefer your clearwater playstyle play that way. I experimeted with clearwater on multiple players and felt it was a big waste of time.