Hello there!
Easy:
00:03:556 - Make the new combo start here not 1/1 after, like you done in both Sekai and normal..?
00:10:223 - New combo here, not 1/1 before, as u done for normal, keep same combo patterns in the difficulties!
00:13:556 - ^
00:16:889 (3,4) - Switch them around, sounds way better when it is like that
00:33:556 - Don't do a new combo here, otherwise you are making the combos too short. Or if u don't want to do that then at least make 0:33:973 (2) your new combo, as combo at 00:30:639 is when she starts singing, not a beat before, and that is what your combo pattern seems to fallow after as well.
0:40:223 (5,1) - Start your new combo here not at 00:41:473, like u done in normal.
01:10:639 - Start your combo here not 2/1 before as both previous combos after spin have began on tall white ticks, but u end your slider there and in these cases new combo should always be after the slider. Then...
01:11:889 (1) - No new combo, you might like to put one at 1:13:139 instead if u'd like.
01:19:806 (1,2) - No new combo at (1) as again the slider ends on tall white lane, so new combo at (2)
Normal:
00:02:306 (1) - No new combo, you don't need it...
0:55:223 (1) - New combo here not 1/1 before, try to have new combos at tall white ticks.
0:57:723 (1) - No new combo
01:09:806 (1,2) - New combo at (2) not (1) - Tall white tick!
01:12:306 (1) - No new combo, you might like to put one at 1:13:139 instead if u want..
01:20:223 (2) - New combo here not 1/1 before - Tall white tick!
Sekai:
00:05:223 (5,6) - I would actually just put a slider there like on Easy and Normal, pro-choice
00:08:556 (6) - New combo - Tall white tick!
00:09:598 (1) - No new combo
00:17:202 (2) - Remove, otherwise this part will be over mapped
00:21:264 - You may like to add a note here?
00:21:889 - New combo
0:45:431 (4,1) - New combo here, not 1/2 later
00:51:889 (6,1) - ^
00:57:098 - New combo
00:58:348 (1,2) - No new combo here, white tick 1/2 after instead
00:59:598 (1) - No new combo
01:11:473 (1,2) - No new combo, put new combo at (2) instead.
01:13:556 - New combo here not 1/1 later - Tall white tick!
01:15:223 (6,7) - New combo + separate from (6)
01:18:348 (1,2) - No new combo at (1), new combo at (2) instead - Tall white tick!
01:23:348 (1,2) - ^
01:26:889 (1) - I think you should begin your spinner here + shorten it by 1/2? Otherwise all three difficulties have different spinner start times, this make Sekai difficulty have the same beginning and end of this spinner as in Normal.
D.N.Angel:
Again combos... Try to start each on tall white ticks and make sure it fallows the combo pattern of the other difficulties. When a slider ends on white tall tick then don't make the slider new combo, make the circle/ slider afterwards a new combo.
00:23:868 (4) - Remove note, sounds better?
01:08:035 (6) - Remove note
01:08:973 (9) - A single note sounds better here
01:22:618 (11) - Remove note?
01:29:389 - Add a note here for a cool ending? Just an idea
Saten:
Combos again - tall white ticks, if ends in slider do the fallowing note ;_; And try not to stuck (1)s with the last notes of the other combos where possible!
A great map and the song, all the sounds are perfectly placed, really like how u put them
Easy:
00:03:556 - Make the new combo start here not 1/1 after, like you done in both Sekai and normal..?
00:10:223 - New combo here, not 1/1 before, as u done for normal, keep same combo patterns in the difficulties!
00:13:556 - ^
00:16:889 (3,4) - Switch them around, sounds way better when it is like that

00:33:556 - Don't do a new combo here, otherwise you are making the combos too short. Or if u don't want to do that then at least make 0:33:973 (2) your new combo, as combo at 00:30:639 is when she starts singing, not a beat before, and that is what your combo pattern seems to fallow after as well.
0:40:223 (5,1) - Start your new combo here not at 00:41:473, like u done in normal.
01:10:639 - Start your combo here not 2/1 before as both previous combos after spin have began on tall white ticks, but u end your slider there and in these cases new combo should always be after the slider. Then...
01:11:889 (1) - No new combo, you might like to put one at 1:13:139 instead if u'd like.
01:19:806 (1,2) - No new combo at (1) as again the slider ends on tall white lane, so new combo at (2)
Normal:
00:02:306 (1) - No new combo, you don't need it...
0:55:223 (1) - New combo here not 1/1 before, try to have new combos at tall white ticks.
0:57:723 (1) - No new combo
01:09:806 (1,2) - New combo at (2) not (1) - Tall white tick!
01:12:306 (1) - No new combo, you might like to put one at 1:13:139 instead if u want..
01:20:223 (2) - New combo here not 1/1 before - Tall white tick!
Sekai:
00:05:223 (5,6) - I would actually just put a slider there like on Easy and Normal, pro-choice

00:08:556 (6) - New combo - Tall white tick!
00:09:598 (1) - No new combo
00:17:202 (2) - Remove, otherwise this part will be over mapped
00:21:264 - You may like to add a note here?
00:21:889 - New combo
0:45:431 (4,1) - New combo here, not 1/2 later
00:51:889 (6,1) - ^
00:57:098 - New combo
00:58:348 (1,2) - No new combo here, white tick 1/2 after instead
00:59:598 (1) - No new combo
01:11:473 (1,2) - No new combo, put new combo at (2) instead.
01:13:556 - New combo here not 1/1 later - Tall white tick!
01:15:223 (6,7) - New combo + separate from (6)
01:18:348 (1,2) - No new combo at (1), new combo at (2) instead - Tall white tick!
01:23:348 (1,2) - ^
01:26:889 (1) - I think you should begin your spinner here + shorten it by 1/2? Otherwise all three difficulties have different spinner start times, this make Sekai difficulty have the same beginning and end of this spinner as in Normal.
D.N.Angel:
Again combos... Try to start each on tall white ticks and make sure it fallows the combo pattern of the other difficulties. When a slider ends on white tall tick then don't make the slider new combo, make the circle/ slider afterwards a new combo.
00:23:868 (4) - Remove note, sounds better?
01:08:035 (6) - Remove note
01:08:973 (9) - A single note sounds better here
01:22:618 (11) - Remove note?
01:29:389 - Add a note here for a cool ending? Just an idea

Saten:
Combos again - tall white ticks, if ends in slider do the fallowing note ;_; And try not to stuck (1)s with the last notes of the other combos where possible!
A great map and the song, all the sounds are perfectly placed, really like how u put them
