On the subject of card choices, I think that Massacre Wurm is THE reason to play black, so I’m astonished that you don’t have it in your deck.

Most pod lists I’m seeing that have success at the moment are going from a 3/1 split of 6 and 7 drops down to a 2/1 split. Your build looks like it’s a little bit top heavy with two 7 drops. How about lowering the curve to increase your game against aggro?

Daybreak Ranger is poised for a breakout as a card vs Delver.

And I think that you want more powerful and impactful cards than Oblivion Ring. It’s never a bad card, but it’s no planeswalker or equivalent effect like Mortarpod or Mimic Vat.

http://magicgameplan.com/blog/naya-pod-dark-ascension-standard/