only gonna mod a few of these since it doesn't look like you're trying too hard to rank this.
General
◾ Map the rest of the Futsuu
◽ OD/HP should look like this, from Kantan to Inner Oni:
-- 3/7
-- 4/7
-- 5/5
-- 5/6
-- 6/6
◾ Check for unsnapped objects in the Oni.
◽ 03:08:417 - and 03:37:411 - There should be a red line (uninherited timing point) here with the "Omit First Bar Line" option enabled to remove this unnecessary barline.
◾ Get the timing at the end checked, or just cut out that part of the music. Honestly, I wouldn't bother with mapping it since it's boring and uninteresting.
◽ There's no kiai, put kiai in there.
Muzukashii
◾ The gap between Futsuu and Muzu is way too much. I in the futsuu you are hardly using 1/2 spacing, but in the muzu it is constant, with many 1/4 spacing used as well. This is unrankable, so I suggest that you look carefully at your futsuu and muzu diffs to see areas in which you can remove notes from the muzu and add them to the futsuu. To do this, look at places in the music that the futsuu may highly represent, or even completely mimic, the patterns used in the kantan. These are places that notes can be added to to make the spread more even.
◽ The most notable areas of conflict are from the beginning to 01:01:865 - , from 01:23:417 - to 01:56:003 - , and pretty much the rest of the map really, there's few places where the spread is acceptable.
◾ These issues are only to be highlighted by the use of 5 note pattern in the muzu. This isn't really appropriate at this bpm, especially when they come after 3 note patterns like at 02:14:107 - . In some of these areas, there is only a 3 note pattern used in the oni, like at 01:48:245 - . Destroy these patterns and use less dense rhythms.
◽ I really do think, besides the use of 5 note patterns and some phrases that are too long like at 01:09:452 - ,this is a fine difficulty, just balance it out with the futsuu.
Oni
◾ 00:49:796 - Using repeated 5 note pattern consecutively leads to a pretty boring map, so change this one to kdkkd or something. Remember that the same rhythmic pattern can pretty much be mapped as anything as long as you're good enough with your words to convince people it's supposed to be like that.
◽ 00:54:279 - You mapped this cymbal earlier but now it's gone and it feels lonely. It calls out, "Mapper-kun, please, I am so cold and I need just one kat to warm me for the night."
◾ 01:01:779 (124,125) - Ctrl-g on these two, the cymbal is too heavy to not map.
◽ 01:06:003 (147) - Make this k for obvious snare sound.
◾ The rest are basically just color changes based on what I think sounds better/what I think should be there, but with a bit of self-modding you should be able to notice places that are like what I pointed out. Consistency in the sounds you map vs the sounds you don't map is important in breakcore maps.