Heyo this is late week surprise mod
Here is a 5120x2880 version of your background, I'll let you crop and resize as you see fit.The first redline at 00:00:135 - is not actually needed so you can delete it.
Your current mp3 is 152kbps, but also is
variable bitrate which is really, really not recommended to use for osu!, or any rhythm game for that matter since variable birates causes noticeable offset shifts throughout the song.
Here is a 192kbps with constant bitrate version of your mp3. Make sure to use 369 as offset for this mp3 aswell (Again, the redline for the first 5 notes is not needed, you can use objects before the first redline).
It seems that some of the custom hitsounds you're using have a slight delay of 6 and 10ms, since hitsounds have to have no delay, here are the fixed versions:
normal-hitfinish.wavnormal-hitclap.wavSo, considering the relatively close spacing and some really tight blankets, I would actually recommend using CS 4.2. It doesn't increase the difficulty noticeably, but does make the blankets look much better in my opinion.
00:15:868 (5,6,1) - I don't wanna point out every bad stack or blankets because that's not that helpful, so here's one example and I'd suggest you to go through your map and fix the ones you can find. That's mostly just polishing though, altough there are some that could really use that (00:34:202 (5,6,7) - 02:35:535 (5,6,1) - ).
The map is otherwise really consistent and doesn't have any major gimmick or confusing patterns (aside from the solo and its 1/6s as I will cover below), so there won't be much else to point out.
Onto the main part of the mod now
I have no issue with using 1/6s if the song has them, neither with using combo color to tell which are which. But, the current issue is that you can't really entirely rely on the red combo color for the 1/6s since you already use it throughout the map on choruses and even for slowdowns. That makes it quite ineffective to use in the solo to tell 1/6s apart from 1/4s. Altough they are less spaced than 1/4s, the difference is not enough to accurately tell before you're already playing it. Since the intent behind your coloring was to tell the player there is a 1/6 before they have to play it, well, it kinda fails here.
I highly recommend using even less spacing for the 1/6s. It doesn't really add much to have them as closely spaced from the 1/4s as they currently are, it just makes them confusing to read when the overall structure and intent of the map really doesn't seem to go in that direction. Even more so when there are no 1/6s before the 4th minute, so no way to prepare the player for them beforehand.
Onto some the 1/6s you missed, and other mishaps.
03:55:368 (1) - This is a 1/6.
04:02:368 (1,2) - I think you could use 1/4 kicksliders here, since they are note on the blue ticks.
04:03:202 (3,4) - This is also a 1/6.
04:05:702 (1,2) - For what it's worth, this should be a 1/3. The attack of the second note comes kinda late, but it's still far from being snapped onto the redtick. I'd say it should be snapped as a
3/8, which sounds closed to what the guitarist is actually doing.
04:08:035 (1,2) - This is a 1/6 too.
04:08:952 (3,1,2) - Another interesting case where there are 3 notes starting from the first blue tick and before the second one (So 4 notes total from one blue tick to another), which is effectively a 1/6 starting on a blue tick. I'd suggest using a repeat slider
like this so the player starts the next stream on the main finger again. Or I guess you could also just ignore it since it is a bit iffy to play in any case.
04:10:368 (1) - It would probably be a good idea to use a different combo color like white for this slowdown slider.
04:15:035 (1,2,3,4,5,6,7) - Probably not a good idea to use the red combo color on 1/4s while you're still in the solo. I'd say use the orange one and then the red for the repeat sliders, just so the player doesn't misread it as a 1/6s.
04:46:702 (1,1) - It is quite unintuitive. You could just make the slider a 1/1 to still fully emphasize the held note, but also to have the stream start on the expected tick. There is not strong enough sound on the white tick to warrant it to be clicked at all cost either. Same goes for 04:52:035 (1,1) - this one.
04:51:035 (1,2,3,4,5,6) - Considering you used longer sliders for held guitar notes, you could do that here too. Those circles feel like fillers currently.
04:54:368 (1,2,3) - So, I know the guitar isn't very accurate in this section, but those are clearly
4 notes on 1/2 snapping. This one isn't up for debate. The rest is kinda iffy, but it mostly fit on 3/4 snapping. 1/3 is too early for most of them. Also 04:57:035 (1) - this one is completely off by 40ms, can't do much about it without fixing the mp3. A redline wouldn't help much either since it's one really off isolated note.
Anyway, that's it for me. Good luck!