you should run Rancor for enchantment sacrifice fuel, its also good on its own, Spine of Ish Sah is good artifact sacrifice fuel and u get to blow up stuff, and if u throw in Black Market it would really get ur mana going with Awakening Zone . Check out my build Shattering Shenanigans its a tribal build version.

Thanks for the comment aznb01777!

Rancor : I was considering it since it certainly has some great synergy but since this is a combo deck making my creatures big and attacking with them is not my biggest concern.

Spine of Ish Sah : I ran it in the original build of this deck, and then took it out. It was too much mana IMO. Also, almost everyone said to take it out.

Black Market : interesting idea, will consider it!

If this deck is going to be competitive u need to have answers for scenarios in ur deck, Rancor would be very good against zur, the enchanter decks (look at this deck build if u haven't play against a zur deck Zur, Offensive Defense) I mention zur because he comes out faster than the other enchantment base edh decks and can lock u down pretty fast.

As for Spine of Ish Sah if u have black market and awakening zone u won't have any problem with mana at all. I get plenty of abuse of it in my shattergang deck, It is easier since I run Gaea's Cradle and Xenagos, The Reveler

I hear where you are coming from aznb01777...

u can get infinite burn/mana with Melira, Sylvok Outcast + Murderous Redcap + Goblin Bombardment or Ashnod's Altar