Casual lifegain commander and deck help. So I'm building another commander deck based on lifegain. Most of the decks I build are fairly strong, but this time I'd like to make it more of a casual deck. I don't want to make the typical Oloro deck, and I'm fine with either an Orzhov or a mono white deck. Any suggestions for lifegain commanders and cards would be greatly appreciated. 

I built a modern soul sisters deck several years ago, and since I don't play modern anymore, I dismantled it and I'm using it as the base of the deck. I also have a fair amount of vampires in my bulk pile that can be used. 