She used to be one of the most core, but nowadays, not so much, especially with the dark hime we'll be getting later on anyway... if you would need her, it wouldn't be for too long... and it's not worth the risk of spending waaaaaaay too much to find her, imo.
Amon/Satan combo outdo her anyway, they both have 3 useful abilities each, and DAma honestly only had 2... her green flavor ability was pretty meh considering it was only to self, even if it was a huge 50% light res and 1.5k regen (500 for 3t) I barely ever used it lol, but that's just me

I can see why they put her with Tsuku and the others because that's who she came out with but... eh, it's still pretty crappy and that makes it all the more NOT worth it.
at least the one with Nike/Aphro will actually have all 3-4? L/E hime that came out last year, and TAphro > DAma