02:11:597 - 02:23:506 - Hitsounding is pretty empty for this section, maybe consider adding some soft-hitwhistle additions? Could also add finishes on sounds like 02:11:961 (2) and 02:17:779 (1) - etc.
03:10:142 (2) - also don't forget the normal-hitfinish here on all diffs excluding top diff
There's some other instances where hitsound weirdness occurs, just make sure to check and adjust the other diffs once you copy hitsounds.
00:37:748 (2) - 5% volume slider head, this may be hard to hear over the song.
02:26:324 (6) - 5% volume circle, this may be hard to hear over the song.
02:37:961 (4) - 5% volume circle, this may be hard to hear over the song.
Metadata source: http://dte.dotera.net/collapse.html
https://www.youtube.com/watch?v=xV1gDBdUUKo
Don't forget to add nyan_kot_nyan and dakiwii to tags
Also here's some additional tags: Heian Alien C78 Comiket 78 Collapse of the sky 封獣 ぬえ Houjuu Nue 上海アリス幻樂団 Team Shanghai Alice rock video game vgm
All game modes within a beatmap must form a spread starting from the lowest difficulty level dictated by the song's drain time. For difficulties above the lowest required difficulty level, the spread cannot skip any difficulty levels and there cannot be any drastically large difficulty gaps between any two difficulties.
i would recommend changing the background as its already used in a ranked map https://osu.ppy.sh/beatmapsets/477813#osu/1020665
Overall, map is really good apart from some really weird overlaps but I see you were consistent with it throughout the map so it should be fine.
You had some issues with comboing, but honestly that's just a personal nit-pick for me and it's really just an easy fix.
Good luck ranking!