I DD there is 1 skill you can invest in to regenerate Health: Survivor's Instinct .

I like to see in D:OS such a skill as Survivor's Instinct OR finding (via quest or quest reward) a piece of equipment that let regerate you mana and/or health ... or something else, like a perk or a "special item".

Or: a skill like Life Leech or Mana Leech ? Stealing mana of health points from an enemy ?

I like the idea of NO regeneration of MP or HP for D:OS !

On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin,
it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !