Yea, I mentioned this observation when someone else posted a thread about improving the regen's in the lifegiver tree. One of the dev's said that it likely deserves a second look -- well, the amount of health and mana the regens do anyway. I don't know how they feel about heal pulling tons of aggro.

It's best not to use the regens, just stick to the first three skills in the tree and you'll be fine. I managed for a long time without them until I switched to shield for elites.