Why not put a Sanguine Bond in? it is the opposite of Exquisite Blood and triggers more often due to Oloro. And it even causes an insta-kill combo at the start of your turn if you have both of these enchantments out because they trigger each other off to do infinite damage and gain infinite life. I don't know if this deck likes insta-win type stuff, but I feel that Sanguine Bond would be an apt addition.

Infinite anything is something I am trying to avoid. I was going to use one of the two enchantments, so I ended up going with Exquisite Blood over Sanguine Bond because it fits the theme of trying to out live my opponents and doesn't make me a huge target. Thanks for the suggestion though.