I'm still wondering though: why no sanctuarity - seems like gravity pull is THE card of the month now, shouldn't you protect against that?
I'm assuming you mean Black Hole since Sanctuary does nothing to protect you from Gravity Pull.
1) This deck is full of support cards which is nice, but it also needs a good number of damage dealers. In order to maintain the quanta balance you would need to remove the Crusader, and I would not remove it for a support card in this deck. You would also need to use 2 in order for it to be worthwhile and I don't really see what else I would consider removing for it.
2) It's fairly obvious in Bronze League when your opponent is going to use Black Hole in their deck and thus it's extremely easy to counter by simply holding Supernova back in your hand until you can lay out a ridiculous amount of damage in that turn. I have yet to lose to a single deck that focuses on using Black Holes in Bronze League so I've never considered Sanctuary a needed card.
Now, if you're using this deck for Silver League then I can't really help you there since the deck was specifically designed to decimate Bronze League. However, to say that a Black Hole deck will kill you no matter what is a serious overstatement and not true in the slightest.