Game kind of snuck up on me, wasn't expecting anything to release during x-mas (and I'm visiting folks) but so far I'm liking it, since I don't have much time to play anyways.

From what I've seen only the super nymphs serve any point, and the cost to level later nymphs doesn't go up so fast, so strategy seems to be to just ignore most of them but every so often level one up to 10 to replace your older super nymphs. Don't bother leveling up anything else.

(Admittedly, first day I spun an amrita with 1 of my 3 tickets, today I rolled a heart pack (3 hearts!), so maybe I'm biased)