That's quite an interesting idea.
Altmer with the Atronach stone should be good enough for your magic pool (+enchantments, if necessary) this way you can focus solely on health. Vampirism for the drain spell seems like a good idea, too, as well as necromancy.
If you find yourself with good enough enchantments, I'd say use the Ritual stone. Underappreciated, I'm sure, but it's got to come in handy for someone like you.
Good luck, and let us know how it goes
