How useful are these skills in PvP?

Drain Life - Steal 140HP from your opponent (maxed out)
I have pulled it off with Drain Life a couple of times killing my opponent but it is no Heal replacement as it is slow and can't eliminate status ailments.

Restore - 40HP + 5HP x 5 sec = 65HP in 5 sec (maxed out)
As for Restore, would that give an edge in PvP. Perhaps on a one on one scenario, say you escape for 5 sec to regenerate and cool-down and use restore to give that low HP a bit of a boost. I have never tested restore yet as I am still training my Bird and Ursan.

Your thoughts and experience please