Hi ~ M4M.
My mapJust suggestions:
[Generall]
Offset +24 IMO but you'd be better to find some other timing. (I'm sure that current is fast.)
[Easy]
Fine! Nothing need to say about this diff.
[Sekai's Normal]
00:20:851 (1,1) - the two sliders are not symmetric. Maybe copy the first one from the other? It will looks much better for me.
00:22:565 (1) - nazi - it can be curved to make a better blanket: (you can use the approach circle to adjust the slider shape)
01:22:565 (1) - if you use a 1/2 slider here, you should use a 1/2 slider at 01:22:994 too to follow the vocal. I think you can change 01:22:565 (1) into a note so the rhythm here is consistent with other part.
01:25:136 (6) - same as 00:22:565 (1)
[Sekai's Hard]
00:23:851 (3) - the slider ends on big white tick. In music, a new vocal start at 00:24:279 (4), where your slider ends, so the slider plays weird. I think you can simply change this slider into a short slider and a note, like this:
00:29:422 (7,1) - nazi - the spacing between them is not keeping the same. To make a better shape, you need to change one of them a little. I prefer change 00:29:422 (7) since it is not vertically symmetric.
00:32:422 (6,1,2) - try to let these sliders arranged in consistent distance? Current patterns looks like they are put randomly. I make a simple example:
00:50:636 (1,1,1) - I think you don't need to add NC on every note... they are just a slow down section so you can put them in one combo, that's enough.
01:03:279 (5,1,2,3) - the spacing change from 1.1x to 1.2x here but there is no such change in the song. I think you do this by mistake. It is not a big issue (I didn't find it while playing) so it is up to you to fix or not.
01:24:279 (2) - I can't say that there is any problem about this pattern, but to me, I will try a pattern like this:
01:25:351 (3,4) - if you change the slider 01:24:279 (2), then change the position of this two notes to make a better flow:
[Insane]
00:19:244 (1) - the spinner is a little short: Although auto can achieve 2000 score, I think a longer spinner is better since the song is not fast. Maybe you can delete previous note(00:19:136 (5)) and start the spinner here. So this spinner will not cause so much difficulty:
00:20:422 (1) - miss a NC?
01:07:565 (6,7) - the vocal have a slight change at 01:07:779, so the stack here is a little weird while playing
01:13:565 (4,5,1) - the jump and distance change follows stack is not so good in flow. I know you use 01:13:994 (1,3) to follow the music, but in privous part you mainly follows the vocal, so I think there should be a long slider (1/1 slider) start at 01:13:779 (1). The rhythm can be this:
For the pattern, maybe you can stack 01:14:422 (2) on head of 01:14:851 (4), like this:
01:15:708 (1,2) - maybe this two slider is too much curved? During test play, I found that the symmetric sliders is not so smooth. Also I changed the curve direction so (2) is different from 01:16:565 (3).
01:24:708 (2) - why not stack it under end of 01:23:208 (1), like 01:23:851 (2)? I think that is funny.
01:27:494 (1) - this note is close to previous spinner end, but far from playfield center. It is generally ok, but if someone is not good at spinner, he need to stop spin in advance.
That's all I can find. GL~
and 
by Sekai-nyan
(ctrl+shift+D)