So after noticing quite a few people like to gain life and hurt the opponent in the process, I rejected the idea. I just didn't feel the cards where there, besides it seemed to be a boring way of playing with white/black lifelinkers, vizkopa, sanguine bond and most often the angel maker. But after playing the other archetypes for so long, I figured I could combine a lifegain deck with some fun combolicious... fun... combo... sorry, my mind wandered off.
I think I have finally succeeded in combining some lifegain with some combo and make it work together - and thus I present "Witch-Maw-hurt-heal". Feel free to get inventive and rename it to something that actually requires coherent thoughtprocesses.
Premise:
I went for ETB lifegain instead of lifelink. The combo comes from rescue from the underworld as a top priority, second all-star player is Seance, third is Jalira. With 3 enablers, getting some ETB running that actually does something becomes fairly consistent.
With 12 mana in play, I've drained opponent for 336 life in my upkeep, having 2 Rhox Faithmenders in play, 2 Sanguine, Vizkopa and using rescue in opponent attackstep to get a Saruli back while saccing a pelakka. In upkeep, as soon as they enter and the ETB lifegain is on the stack, I activated Vizkopa 4 times. 56 life gained, 336 lost for opponent. He was @ 134 life, and I hadn't done the math, so admittedly it was overkill.
My more usual kills are from rescue-sac'ing anything for some ETB lifegain, often a vizkopa as it's cheap and it can activate it's ability in upkeep multiple times with ETB on stack and all mana untapped. With Jalira doing her thing, end-step wurm for lifegain and possibly lifeloss from sanguine, then attack for 7 which in itself can be surprising for opponent and still having mana open to do more makes her useful enough to include blue.
If someone already posted something like this, I apologize, I don't frequent the deck threads very much, I prefer to make decks from scratch.