A few suggestions for cards you might cut.
Maze Abomination since you have a single multicolored card. You'd be better served by something like Vampire Nighthawk, it is significantly less powerful but is also half the cost and has lifelink and flying.
Shadow Guildmage is the only card in your deck requiring blue mana and one of two requiring red mana. I would leave in your Rakdos Guildgate so that you can still use Deviant Glee, though since it looks like you're splashing green there are more efficient ways to get trample into this deck, Unflinching Courage and Armadillo Cloak both leap to mind.
Barrow Ghoul or Soulshriek. Either one is fine but they work against each other. Barrow Ghoul removes creature cards from your graveyard each turn while Soulshriek requires creatures in the graveyard to see any benefit.
Might suggest an Orzhov Keyrune to go in place of or in addition to the Orzhov Cluestone you already have.
Faith Healer doesn't really complement your selection of enchantments. Your enchantments are designed to hurt your opponent or pump your creatures. I'd substitute a Soul's Attendant or Soul Warden instead.
Tavern Swindler, while not bad, seems to have bad odds of gaining life. Personally I'd either cut it outright or replace it with a generic 2/2 for 2, probably a zombie to keep it in black.
I've tried to keep my suggestions in a very affordable range, any card shop should be able to hook you up with these.