I think you should lean a lot more into black's strength of paying life and draw cards, and overall your card draw seems painfully lacking, I only see 3 cards that actively draw you more and feel like you'll stall out if you don't add more.
Ambition's Cost,
Sign in Blood and
Night's Whisper aren't cool, but they do a lot of work. And alway run
Necropotence if you can afford it.