Oh I can talk about the music all day 8D
My favorites are many and it's difficult to choose between them. Btw, isn't Heir Seer Knight Witch from the unofficial album LOFAM1?
Skaian Shrapnel, Another Chance, Despot, Stress, Dogfight, Pendulum, Teal Hunter, Galaxy Hearts, Even In Death, Infinity Mechanism, Doctor, Savior of the Dreaming Dead, Gaia Queen, Descend, Crystalanthology and pretty much the whole Felt album <3 My ultimate favorites would have to be the bolded ones I think. I just can't listen to them without feeling thrilled and loving every bit to death. I guess there's at least one unofficial track in there too: Rise of the Denizens. Gosh, it's so lovely. Actually, almost all of LOFAM2 is magnificent.
ALSO have you watched the Cascade video (on youtube because it's easier to time it) with sound turned off and "A Taste For Adventure" as alternative soundtrack? It only goes as far as to where Jade god tiers, but it's really amazing how great it works with it. You sort of have to time it to start like 4 or 6 seconds in though, I don't quite remember.