Aloha
[Oni]
00:09:572 (18) - This is actually k since 00:09:206 (17) - is slighty calmer than (18).
00:10:670 - I was actually suggesting to use k here since it's also a key sound it carries well but uh, I see why you kept it empty despite it sounds and feels weird.
00:11:767 (22,23,24,25,1) - kkddk is simpler, yes. But if you really want to follow the music properly you should use dkkdk.
00:14:694 - Unlike 00:16:157 - this timestamp feels too strong as you wouldn't use a d note here.
00:16:889 (9) - kinda feels like you should use k here too since it fades out slowly while it's significantely higher than 00:17:255 (10) - .
00:21:279 (21) - compared to 00:21:096 (20) - this is lighter and pretty similar with 00:22:011 (23) - , therefore I'd go with k.
00:50:548 (29) - since you map the beep sound with k, I don't see how d works here instead of k. You also did 00:47:621 (25) - as k note so why not (29) too?
00:52:011 (31) - I'd even argue about this but since you follow the piano here - which sounds stronger imo - that's fine to use d here.
00:54:938 (38) - then again, this would be smarter to have k k k d again like 00:47:621 (25,26,27,28) - .
01:18:352 (44) - Although you mainly follow the background music, I think to leave this note out makes the emphasis of 01:17:987 (43) - stronger.
01:25:487 - Meanwhile it sounds good to connect 01:24:938 (59,60,61,1) - together with d note on 01:25:487 - .
01:29:694 (15,16,17,18,19,20) - the oo oooo is a good start but I think you can change this to dk kd k which fits to both, background and vocals.
01:31:889 (24,25,26,27,28,29) - similar to the previous suggestion, the doublet usage could be improved, change this part like that:
https://derpovic.s-ul.eu/6P7iP2z9 (starting from (24 till 28)
01:39:938 (8,9,10) - You could swap them to have kdd, the vocals looks more appropriate emphasize with k.
01:47:438 (4) - The note sounds quite forced, 01:46:889 (2,3) - sounds stronger if they're alone so the vocals will be emphasized better.
01:49:816 (13,14) - Any reasons you haven't mapped them as k k? d d may works too but I'd go with k k instead.
02:22:560 (67,68) - Similar to 01:18:352 (44) - these notes can be removed to give the vocal mapping with 02:22:377 (66) - a bigger impact.
02:34:267 (16) - since 02:34:633 (18,19) - are similar to 02:34:084 (15,16) - they both can be k k as well, it sounds good if you ask me.
02:36:645 (27) - like 01:31:889 - this note could be removed.
03:10:695 (3) - is pretty much the same impact level than 03:10:323 (2) - so d is more appropriate here.
03:35:958 (14,15,16,17,18) - instead of dddkd, you could do a reversed 03:34:495 (9,10,11,12,13) - here, means to use kdkdk.
04:13:606 (7,8) - Uh, this is rather 1/8 than 1/6, should be fine in this case since it's 86 BPM where it's not dramatical to use 1/8 for once when it actually fits.
04:18:240 (16) - same case like 02:36:645 (27) - and 01:31:889 - .
Generally, I am an oppoment against bigger volume changes but I get where do you want with them. However, you need to adjust them a bit better, some sounds too sudden and loud.
00:59:328 - Since the vocals and a new background beat are added you should slightly increase the volume to 30%.
01:20:548 - may increase to 40% because 30% starts to become too calm.
01:24:206 - because of the very strong drum sound you should already start here with 50% and..
01:25:670 - could be changed to 50% since I find 60% to noisy.
01:52:011 - ^ when applied.
02:02:255 - should be 30%, 60% is way too loud and sudden.
02:03:718 - could be added for 40%, 30% almost sounds too calm imo.
02:27:499 - like previously, add 50% here already.
02:30:060 - same case than 01:25:670 - .
02:53:474 - There is no need to stick with 60% while the song is from one second to another pretty calm, use 30% here.
03:00:974 - works with 45%.
03:02:255 - 03:38:152 - The entire section works much better with 30% since there is barely any volume drops here.
03:45:915 - 04:01:416 - ^
04:01:411 - in case you apply to the last two points above, from here you can go to 40%.
04:14:581 - yeah, you know what I want from you. :3c
04:43:849 - ^
05:07:269 - Sounds almost too calm with 20%, try 30%.
05:09:437 - 05:09:789 - 05:10:173 - should go with 40% since 60% is too noisy and fits better with the previous suggestion.
Good luck!