Love the new build. How did you do? :) I wanted to ask about a few cards since your build is different than mine is. How is DRS? I thought about using him even in my monoblack pox. Seems like a good source of damage as well as a way to get rid of some of your opponents lands and spells. As far as taking care of creatures, is Oubliette and multiple copies of maze of ith working pretty well? In the mainboard, you have Abyss but no reoccuring creatures. That seems like it would hurt you pretty hard as well. Is there a reason its there? 

Looks like a great build. Are you going for resource denial? I have two Nether Voids in my deck and they are pretty brutal to play at a neutral/favorable board state. It works well with your creatures and your factories. If you can afford them, I'd try some Tabernacles. Playing one on the board can be absolutely brutal, especially in combination with the factories and the bloodghasts. I've seen a lot of people play with the bogs, but I don't use them just because the "comes into play tapped" can slow things down early game.