Health regen vs vampirism (on hard)

I'm trying killer vegan for the stat boosts with vampirism which has been going well, but I've been wondering if I would be better off stacking health regen from vegan, flesh shield, and MoA. It would have to be pretty impressive to beat out the amount of in combat regen vampirism gives for no skill point investment.

Has anyone tried this out?

 

I decided that vampirism doesn't work on enough enemies. The end.

 

Just doesn't work well with veganism, because animals are the biggest source of vampire healing.

 

Unless you have emo. Because vampire + vegan makes for many many fun sparkles (combine with astrology).