modum.. i don't think i can touch anything here lol, but let me concluded a quick review instead:
regarding notes density,
00:19:747 (19747|2,19747|4,19747|0,19747|6) - loud crash + new sequence so its legit to use 4 notes but then you had the upcoming sequence with similar notes density 00:20:134 (20134|0,20134|4,20134|2,20134|6) - 00:20:521 (20521|6,20521|2,20521|4,20521|0) - you need to either reduce note usage or differentiate their pattern
00:22:070 (22070|2,22070|6,22070|4,22070|5,22070|0) - you gave them 5 notes out of nowhere
it will be nice if you keep the notes sequence consistent, like you did here 00:23:231 (23231|0,23231|2,23231|6,23231|4,23618|3,23618|0,23618|6,24005|4,24005|0,24005|2,24005|6) - , 4 - 3 - 4, they rhyme well and fit with the rhythm right?
00:24:779 (24779|5,24779|1,24779|2,24779|6,25166|5,25166|1,25166|2,25166|6) - don't align them on same column, they have different beat, try to refer to the pitch and allocate notes based on it so your patterning are more revealing and appealing to the players
00:25:554 (25554|4,25554|0,25554|1,25554|5,25941|4,25941|0,25941|1,25941|5) - ^
notes density also changed out of nowhere despite having the same loudness 00:51:102 (51102|5,51102|0,51102|4) - 00:51:489 (51489|5,51489|2,51489|6) - and then revert back to triplets 00:51:876 (51876|0,51876|5,51876|4) - , watch out for its consistency
00:59:618 (59618|6,59618|4) - the dual notes should ended here 00:59:231 (59231|4,59231|6) - , use 1 note is more than enough at this time due to silent sound, so i suggest delete 00:59:618 (59618|6) -
honestly, i think quad notes are enough to accent the current loudness 01:03:876 (63876|5,63876|6,63876|1,63876|0,63876|4) - and 01:04:263 (64263|5,64263|0,64263|2,64263|6,64263|1) - as well. reason is due to overpowering the upcoming sound 01:04:650 (64650|3,64650|2,64650|6,64650|0,64650|4) - which are clearly stronger, but alas, given the same amount of notes density
oh and there's 01:16:650 (76650|4,76650|0,76650|2,76650|6,77037|4,77037|0,77037|2,77037|6) - each row represents far different sound and instruments they have, try to differentiate them instead of keeping it linear here
01:52:070 (112070|3,112263|3,112457|3,112650|3) - there's no reason for these jacks to even exist in the first place, as the sound meant to be mapped already represented by the burst of long notes you made 01:52:070 (112070|0,112166|2,112263|4,112360|0,112360|6,112457|2,112554|4,112650|6) -
01:53:037 (113037|3) - might as well delete it, not balance
hmm, further tweaking might be futile since the difficulties lies within the root core of the map, thus i could not proceed my modding
well, in conclusion, your mapping style itself is great however it is over mapped. while this maybe made for challenges, i could only imagine myself being stressed out figuring what notes to press during game play. the long notes look quite fun, but the issue is whether people can tolerate such over mapping, or not. if you plan to rank this, sure you can keep it over map but at least make sure the density of notes a sound you plotted are within reasons, not fashions
good luck with your map c: