Taiko mod~
All are suggestions unless in red.
[Kantan]
HP -> 3, CS -> 4, AR - > 3
00:31:758 (40) - change to k maybe, so the pitch drop to 00:32:660 (41) is noticable
00:42:585 (54) - change to d, it's the same pitch as 00:40:781 (52)
00:52:510 (60) - change to k, it will be more consistent with the previous one
[Futsuu]
HP -> 4, CS -> 4, AR - > 4
00:03:563 (6) - suggest deleting this, since it sounds more consistent without it, up to you though
00:07:397 - add a d here, the drums coming in here shouldn't be ignored
00:57:360 (93,95) - change these to K, it plays fine and looks aesthetically better~
01:34:916 (166) - delete and start the spinner at 01:34:916, otherwise the spinner is not starting on beat (it'll match Kantan too this way)
[Muzukashii]
CS ->4
00:57:360 (127,129) - change these to K, like in Futsuu
00:58:826 (130,131) - try deleting these two, then use ddd kkk, it'll fits the drums better~ see if you prefer this
01:34:916 (235) - delete and start spinner here, like Futsuu
[Oni]
00:12:585 (41,42,43) - if you wat to strictly follow the melody then here it's dkkk in 1/6 snap
01:34:916 (354) - delete and start spinner here, like above
good luck with rank~