00:20:400 (20400|3,20458|2) - imo i think moving 00:20:400 (20400|3) - to column 1 would be better to represent how the sound gradually rises in pitch, and also to avoid having two mirrored trills on the same hand (not detrimental to gameplay in any way but it could probably just be avoided. feel free to reject this if you disagree!)

00:31:592 (31592|3,31669|3,31746|3) - haven't had many issues playing this personally but it does feel quite straining to have 00:31:246 (31246|2,31362|2,31477|2,31554|2,31592|3,31669|3,31746|3) - all on the right hand, perhaps the final jack could be either moved to the left hand or split into two parts

00:38:054 (38054|1) - could probably use a double for this since it seems to be part of the same set of drums as 00:37:938 (37938|2,37938|3) - , but this is super trivial so feel free to disagree
if yes, apply this also here: 01:37:131 (97131|1) -

00:48:208 (48208|0,48265|1,48323|0) - i think this should be a 1/6 - you never omit these drums if not when sounds like 00:38:977 (38977|0,39035|1,39092|0,39150|1) - also appear simultaneously

01:00:631 (60631|3,60708|3,60785|3) - this jack feels pretty weird and it doesnt make the pattern stand out as much as it should especially after another jack here 00:59:323 (59323|3,59419|3,59515|3) - . i would probably choose to have a burst here instead of a fast 1/6 jack, feels more fitting, comfortable, and makes the pattern stand out more between everything else

01:01:131 (61131|1,61188|0,61246|1) - don't think this 1/8 trill is any necessary, everything here is 1/6 so this faster rhythm feels awkward when playing (purely from a ''playfeel'' point of view - nothing wrong with how this is executed) especially when the sounds are very deep and prominent, would go with full on 1/6 jacks here

01:27:631 (87631|1,87708|1) - don't see the purpose of this jack - can i have some clarifications? i feel like its not following the echo that well because it just stops 01:27:554 (87554|2) - here. if anything, you should've had like two lns here snapped to 1/8

01:28:650 - was a 1/8 missed here? i wouldn't really see any reason why this should be omitted when you apparently follow the same set of sounds with 01:28:708 (88708|2,88823|2) -
01:29:573 - i'd also fit a 1/8 here, just slightly different sounds from the 1/8 trill below

01:35:631 (95631|1,95649|0,95746|0,95842|0,95862|2,95862|1,95977|1,96092|2,96112|3,96208|3,96303|3,96323|2,96323|1) - i believe these patterns are very unfitting - they really just felt like consecutive 1/4 doubles when the nature of the sounds is very fragmented. i would take a more technical approach rather than have this mix of snaps

02:22:015 (142015|1,142073|1,142131|2,142169|1,142246|2) - personally believe this pattern is very uncomfortable - the middle columns are overwhelmed, and having such a long note after a minijack this fast only makes it worse - i would definitely find a way around to avoid having this situation, as this isolated instance could even be passable, but the other iterations, paired with strain and all the patterns before, become very unpleasant to execute

02:22:362 (142362|3,142419|0,142477|2,142477|3) - don't see why this is a 1/8 - sounds 1/6 to me

02:23:515 (143515|1,143515|3,143573|0,143573|2,143631|3,143631|0,143746|2,143746|0,143804|1,143804|3,143862|3,143862|0,143977|3,143977|1,144035|2,144035|0,144092|0,144092|3) -
main reason of my post.
this pattern sticks out like a sore thumb, i find it's execution very uncomfortable, and the issue doesn't even come from the minijacks, but from the lns alongside them. things like 02:23:515 (143515|1,143573|2,143631|3,143746|2,143804|1,143862|0) - paired with these 02:23:573 (143573|0,143631|0,143804|3,143862|3) - are really hard, and i can't really seem to play these without resorting to directly manipulating the pattern (unsuccessfully too, as this causes huge accuracy drops). playability concern aside - it is a notable difficulty spike throughout an already fast paced map. i find myself having 99% accuracy up until this point where it drops by about 0.8/1%, which should show that it is indeed not balanced compared to what comes before.

don't get me wrong, i am a fan of these very ''unique'' patterns, and i think that it is indeed possible to keep these, so my solution would be to shorten the lns as much as you can, because the bpm is very low, so they're much longer than they look like (and become barely possible to properly hold), and these 1/8 gaps between each ln 02:23:573 (143573|2,143746|2,143804|1,143977|1) - add onto how difficult it already is. i am open to other solutions proposed by you - as long as this problem can be resolved.