It seems they have decent survivability - just not sure if it's "enough" healing. I don't know enough about them to know if it will work. It's great to try these types of things though.
I would think ilvl 850 would be enough for HC though as a marker to know if it works. 810 is the minimum to get into it, and it hands out 825+ items, so being 850 you should be geared enough to handle them.