Is this magic the gathering deck good?

I'd probably add some Vampire Nighthawks, Gatekeeper of Malakirs, and Malakir Bloodwitches. These are really great in vamp decks. The Nighthawks is a 2/3 flyer with lifelink and death touch for 3, Gatekeepers have an ability to make your opponents sacrifice a creature (reg cost is 2, kicked it costs 3) and it's a 2/2, and Bloodwitches are 4/3 flyers that cause your opponent to lose life equal to the number of vamps you control and you to gain that life.