I'm no ace when it comes to commander deckbuilding but if I had to make a couple if suggestions I'd recommend cutting Sanitarium Skeleton for one of the other black "Bloodsoaked" -creatures. Cult Conscript and Dread Wanderer come to mind.

Then there's always Stitcher's Supplier to grease the wheels a little.

My instinct is to use him as a weird life gain. Pay a bunch of life down super low and use him to bring me back to 20 and do it again lol.

Ad nauseum Bolas’s citadel Etc