This deck is awesome. As a someone who is on the slightly more competitive end of the casual spectrum I find it difficult to build decks with more than 60 cards, but this seems like a great excuse.

A few thoughts on the deck itself:

There are two copies of Savra, Queen of the Golgari but not many ways to sacrifice creatures. Something like a Spawning Pit or Viscera Seer wouldn't go amiss to help her out.

Also with a lot of creatures going to the graveyard a Living Death effect or two would be nice for the late game, or even a Splinterfright or Kessig Cagebreakers .

Usually Shambling Shell and Woebringer Demon are enough to keep Savra running, but you're right, I should probably look for a couple more. I think I'll look for more creatures that sacrifice themselves to do something useful. Going in that direction would also give me more ammo for your other suggestions. Thanks!

No problem, when it comes to creatures that sacrifice themselves Fleshbag Marauder is always a favourite of mine, especially since you can sac a dredger instead.