I really miss here the
Legion Lieutenant and
Aether Vial. I mean the Vial is the only chance to make your deck unpredictable. I love to play vamps but a huge disadvantage is that they don’t do a lot while entering the battlefield (compared to humans or
spirits). Additional your win-con is not same powerful as Merfolk. Finally, there is
Bloodghast... we can argue if it’s a good card or not but regarding your deck it might be good as a target to sac to feed your vamps with
Cordial Vampire (btw: why do you play just two of them ? It might be the best card of your deck!)