Hi there. Here I am as per your request. Note that whatever I say is my own opinion so you do not have to follow everything I say.
Note that when playing this my speed has gone down and I have not played a lot of AR9+ songs, so my mod may not be accurate.
GeneralWhen searching for this song on youtube:
https://www.youtube.com/watch?v=RcAFRguM9Jw, I found some extra information that you can put into tags if you want. More tags will help with finding the song but if you do not want to that is fine.
Song title: 永夜 「Imperishable Challengers」
Arrangement: RD-Sounds
Vocals: Meramipop
Original song: Evening Primrose (Ending theme) / Flight of the Bamboo Cutter ~ Lunatic Princess (Kaguya Houraisan's Theme)
Source: Touhou Eiyashou ~ Imperishable Night
Circle: RD-Sounds
Album: 奉 -Sasage-
1) I am curious as to why use AR 9.3? For me it is easier when I play with AR9, but that is due to my speed dropping. However, considering that the music is calm, a lower AR will suit it, but if other people are fine with this AR, then do not change it.
2) 00:31:330 (1,2,3,4) - While this rhythm is fine, compared to the start of the song, which uses this pattern 00:21:225 (1,2,3), I prefer the latter rhythm. The reason is that 00:21:857 (3) fits really well with the stringed instrument that is playing at that time. I do know that you may be thinking that copying the same pattern will be probably be boring for the player.
3) 01:19:330 (1,3) - I was thinking you can make these sliders parallel, but that is a small thing so you may not want to change it.
4) 01:23:278 (1,2,1,2,3) - Instead of a back and forth pattern you may try a star pattern or a pentagon pattern. If you do decide to do that I would use ctrl+shift+d as a guide for creating the said shape.
If you do decide to keep the back and forth jump, I was thinking for 01:23:593 (1,2,3) - To increase the distance between 2 and 3 just to make it a little bit more challenging.
https://osu.ppy.sh/ss/42965125) 02:14:909 (1,2,3,4,5,6,7,8,1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8) - I am not a big fan of the jumps but that is because I like to follow the vocals, which would then lower the difficulty of this part and hence the overall difficulty of this map. That said however, when I first played this at parts such as 02:16:172 (1,2,3,4,5) - I did not expect to change direction from 2 to 3 to 3 to 4. I also feel the jumps to be pretty large, though this is an extra diff so you can get away with it.
6) 02:41:278, 02:43:172, 02:43:804, 02:46:330, 02:46:962, 02:48:225, 02:48:857, 02:49:488. These are strong beats, so I am curious as to why you do not have a note there? Add notes there please.
7) 02:50:278 to 02:52:488 Perhaps consider adding a section with lower slider velocity and follow the vocals here. The reason is that here the vocals are prominent and to me it is a waste if you do not use it. I assume you are trying some effect, though in today's map people do this all the time, which I do not like.
Applies to 02:55:409
8) 03:25:488 (9,10,1,2,3,4,5,1,2,3,4,1,2,3,4,5,6) - I do know that you are following that guitar bit at the back, and I do like your idea of changing the volume to match that. I do suggest that you add more timing points if you do desire a smoother increase/decrease in the volume.
9) 05:26:436 (4,5,6) - Shouldn't you angle slider 4 down so it flows neatly into 5 and 6?
Final ThoughtsDespite my slow speed, I did enjoy the hitsounds and sb and I did like most of the map. Some of the changes are personal niggles, such as the AR being too high and my aversion to the relatively huge jumps.
Good luck with the mapset.