In the case of unupped novas, use 6 cremations...
I think the 6 cremations would actually be better with a QT/SN setup because of the inconsistencies of towers, and the likely chance you won't play a supernova until turn 2 or later.
Actually SN+cremation=2 golems, and lucky tower+cremation=1 seraph...
For 2 golems: gnome/crema/2x nova > 2x golem or 2x gnome/2x crema > 2x golem.
For 1 seraph: 2x gnome/2x crema > seraph or gnome/crema/nova > seraph.
Getting a seraph is possibly better with novas, because it doesn't rely on QT. Getting a golem requires the same setup (two immo combos) or QT luck, which isn't the best thing to rely on.
...and nova, while adding consistency, reduces the quanta supply.
In the long run, yes, but you don't need much quanta in the long run with a deck like this, because you play cards as soon as you get their quanta off, which is just as possible with novas.
And, how'd you utilise the BH from exploded SoFo? That's why discord is here.
I rarely did, because the deck wins so fast. In fact, it would probably be better to swap out the discords with vampire daggers in the nova deck for even faster wins. I only kept the SoFos in because it's the best PC in a limited quanta rainbow.