Anger works well with Avatar of Discord.
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Annihilator works very well with such a deck! If you have the luck to put an Eldrazi into play the first turn, you have practically sealed the game. Demon of Death's Gate seems to be a bit inefficient. Cards like Avatar of Woe or Wurmcoil Engine could be better.
Especially the fact that combat damage no more goes onto the stack is a pain in the ass. The concept of a stack is so simple and beautiful, but now Magic destroyed the consistency in the game. Now it is not enough to understand the stack, no, you also have to gather knowledge about all these special extra combat rules! In Germany you would say "Why make it simple when you can also make it complicated" (sarcasm).
Looks like fun!