[General]
The gap between Insane and Hard is massive but uh... I don't know, you could call Insane "Extra" and make a harder version of Hard if you wanted to. Not necessary in my opinion.
[Insane]
(all suggestions)
This map is hard as hell. HP -1 to be a little more forgiven if you want.
00:14:325 (1) - Shorten this slider by 1/4th -- I really feel the piano here. (keeping the kick sound here works really well too)
02:07:605 (4,1,2,3,4) - This pattern is questionable. I like the emphasis it puts on the music right here; however, the spacing from 4 -> 1 makes players hit 2 much earlier than they should. This happened to me and another person I spectated while playing. You should consider changing it. (happens previously at 00:50:805 as well)
Notes about this diff to other modders:
00:20:685 (1) - this is completely playable. also, AIBat considers some of these sliders unsnapped but I'm pretty sure that's only because of 1/12.
01:13:965 (1) ~ 01:14:805 (4) - is really hard but completely playable
[Hard]
00:20:085 (3) - This part is kind of tricky -- making these three notes into a repeat slider will make people hit 00:20:565 (4,5) more easily due to the pattern being less complex.
01:19:725 (3) - This note needs to be stressed. Delete 01:19:485 (2) and replace the start of it with a hit circle. After that, make a 1/2-slider starting at 01:19:725 (3).
01:33:165 (3,4) - This pattern is kinda unreadable. Besides, it would follow the music better if you simply put a 1/3
Other difficulties are fine