So, I tried it out.
It works but I found some issues that have to be improved.
1.
6 Nova to pay
but total cost of water is 5 + 4 = 9. So you'll never be able to play all
cards, also Purify wasn't very useful (not to mention that Chrysaora eat your already tight
quanta).
2.
Too less
quanta. Novas are good to play the cat first turn but 4 Pends are not reliable enough to use their ability every turn. You only have 4 in 36 cards and they give
every two turns. Also, Soul Catcher can be way too slow to power all your
cards you have in hand, especially when you only drew one.
3.
Lack of Speed and/or defense. You must be very lucky to draw either one of two Vulture or Bone Walls in a 36 Card deck, which actually are (next to poison) your only reliable damage dealer/defense.
So I'd personally remove all water and thus the Novas and stick with a
duo which is more efficient in my opinion and allows you to add more pends, Bone Walls and Vultures.
Except you want stick with water, in that case I'd remove