00:45:867 (1,2,3,4) - i think your stacking here makes no sense for what the vocals are doing
basically they are going as: (1) vocal, (2) no vocal, and (3) and (4) have vocal aswell, so a more reasonable stack would be here 00:45:867 (1) - instead of how it is right now
https://i.imgur.com/jDdA0f9.png
Some stacking in your kiai section makes no sense. Kiai is supposed to be the most intense section of your beatmap, so there's no need to stack circles when they have 2 impactful sounds. I would suggest placing your stacks depending in how the pitch in the instruments or vocals are. For example:
high pitch vocal/drum > low pitch vocal/drum: stack
high pitch vocal/drum > high pitch vocal/drum: don't stack
here are some examples in which i think your stacking is lacking
00:52:381 (4,5) -
00:53:067 (2,3) -
00:57:867 (4,5) -
01:03:352 (4,5) -
01:04:724 (5,6) -
i think you could apply this mod #4453744 to the stacks that are after a 1/1 gap
00:57:867 (4,5) - you could unstack this and instead stack it to the next slider
https://i.imgur.com/gvgkqph.png
01:20:067 (5,6) - unstack this to keep consistency with 01:15:267 (5,6) -
and a newer player can have troubles reading a 1/4 stack and then after a 1/2 stack