Alright, this is how I'm looking at it:
1) Make the ice/2 queen > chrysa swap - 8 cards to add, 15 to pull out
2) Remove 1 each of BB, stiletto, shockwave, tstorm, OE from that pool, and thus keep them in the vault - 8 cards to add, 10 cards to pull out
So, we can swap out 8 of the following 10 cards: 2x BB, 1x steal, 2x nightmare, 2x shockwave, 1x tstorm, 2x OE
Personally, I'd also keep the steal and one nightmare or the remaining tstorm (the latter per rob in chat), and swap out the rest for those suggestions.