Have you looked at Blood Artist or Vampire Nighthawk? Both would be beneficial I think

I am already playing four Vampire Nighthawk but thank you for the suggestion. I thought that Kalastria Highborn would work why would Blood Artist be better?

If you get both Exquisite Blood and Sanguine Bond on the field and gain life or deal damage its GAME OVER. Exsanguinate works well with both of those enchantments, especially when playing multiplayer. Blood Tribute also works well with Sanguine Bond.

Bloodghast I think is a must in any Vamp themed deck because unless they get exiled, they just keep coming back.

For mana ramp I see you have Nykthos, Shrine to Nyx that's a really good one, I would also recommend Cabal Coffers.

I use Vampire Hexmage to get rid of Planeswalkers or pesky Hydras, and you boost up your Blade of the Bloodchief in the process.

Although expensive to cast, Nirkana Revenant is quite the beast. Once you have the 6 mana to bust her out, on her next turn when summoning sickness wears off, she can swing for 16 if you got all swamps. She makes your swamps tap for 2, which is also nice.

i am working on getting a play set of Bloodghast

unfortunately Nirkana Revenant is too expensive for me to buy one

also I think you are confusing my side board with my deck

@ebonzekken i recommend Blood Artist as it triggers of anything on the field dying, ive played both (my first real deck was a vamp deck, still have it) and blood artist wins out every time, i have won a couple times because an opponent decided to kill too many creatures at once, or having sac outlets. Also it dosnt require you to keep any mana available.

another thing i would recomend is to add some more removal, and to add some sac outlets like Viscera Seer especially if you add some blood artists.