So. I really don't understand nearly anything that's going on in AXION_REBORN
But, I believe that 00:53:093 - has a missing object at the very least in AXION_REBORN because you're mapping like everything occasioanlly (which is completely unnecessary and not suitable for osu - this is a rhythm game not a orchestra simulator) Currently the gap you have here looks completely broken when there should be an object cos there's drums and synth stuff.
Edit: So, 00:27:587 - no object here? You're mapping the synth most of the time, but you start off the intense rhythm stuff with something which isn't even in the song. This should be a triple.
00:27:681 (3) - This is a terrible example of how to use a repeat slider. You put the clap on the middle of the slider whilst the slider head and tail land on blue ticks which are synths which are constantly 1/4 beats for several bars. I don't understand.
00:43:525 (1,2,3,4,1,2,3,4,1,2,3,4,1,2,1) - This section in the song has constant 1/4 synth stuff, but that's like the least interesting part of this part of the song. You could do such good things by mixing in the drums with the synth stuff.
00:49:525 (1,2,3,4,1) - Overmap, no need for 1/8 sliders here. Sounds like we should be expecting a rollover sound, but we don't.
01:00:212 (7,8,1,2,3,4,1,2,3,4,1,2,3,4) - This might look cool. But wtf. Going back on yourself in streams is ass. 01:00:681 (4,1) - I can hear in the song the justification for this, but it just doesn't fit. So, in this pattern you're mapping the piano, therefore why have you included in the same pattern this 01:00:400 (1,2,3) - this is not piano sounds part of the rhythm, yet you included it in the pattern making it look exactly the same as the rest which is confusing. The pattern should start at 01:00:681 (4) -
01:00:400 (1) - This should basically be a 1/2 slider because right now this pattern doesn't make sense.
Whilst we're at it, can you explain these jumps 01:34:525 (3,4,5) - So, there's a jump from 3 to 4 cos of a synth, but then there's a reduction in DS from 4 to 5 despite it being a drum and when you're listening to the song it is much more dominant than a subtle change in the synth stuff.
01:38:650 (1,2,3,4) - These are all practically the same sounds yet why have you spaced them like this? They should have equal spacing.
A few points that Hula raised were also the thing that xilver wondered about. Given how the map is structured 00:52:900 - looks like you deleted something on accident. It looks pretty out of place given how the map is structured around more or less constant clicking.