Mavren Fein is a dud since I have no other vampires... other than Vona and itself. Most of the time, I would just be sending Mavren to his doom just to make a 1/1 token.
The caveat of lifegain decks is that you need to have enough payoffs. I'm actually at the point where life gain is the weakest part of the deck, and I probably should've cut the
Ajani's Pridemate package altogether. The Bell-Haunt is more powerful because of the discard a card ability and decent body.