Mod for the collab:
00:37:038 (1,1,1,1,1,1,1,1) - These circles lack structure. Also, don't use new combo so much, each new object doesn't need to be a new combo. As far as the player knows, they were placed randomly. Use a constant distance snap for all of these(I recommend 0.8x) and place them in a more organized manner that leads into the next slider, something like this.
http://prntscr.com/771q4t00:40:861 (1,1,1,1) - Do the same for these circles.
00:44:685 (1,1,1,1,1,1,1) - These circles are better structured than the previous ones, but could still be much better. Do the same here.
00:46:744 (1,1,1,2,1) - Recommend making all of this a combo.
00:49:979 (2,3,1,1,2,3,4,5,6,7) - Same as above.
00:51:744 (2,3,4,5,6,7) - Again, fix the structure. The note placement seems random.
01:13:509 (1) - Um, maybe split this into more than one slider? ._.
01:18:509 (2,3,4,5,1,2,3,4,5,1,2,3,4,5,6) - Again, general structure issues. I see you are going for a triangle here, but it's better not to. I don't think it fits. Just use a general combination of sliders and circles.
01:58:214 (1,1,1,1) - Make this a combo.
02:00:861 (1,1,1) - Give these more structure. Use a bigger distance snap, it looks really jumbled this way.
02:05:273 (2,3,4,5) - Again, these circles need more structure.
02:04:685 (1,2,3,4,5,1) - Make this a combo.
02:10:567 (1,2,3,4,5,6) - It was alright until the second circle, then once again the beat placement is rather erratic. Fix this. Preferably, do it in a matter where the slider afterwards doesn't have to be moved, to allow flow into the next section.
02:35:861 (1,1,1,2) - Preferably split this into more sliders and circles. It's alright, but it's a snoozefest to play. Also, the map doesn't have to end in a spinner. It's probably better to end it with a pair of 1-beat sliders at these places, like these. Don't use ones like these, though, they're not very good. Use the in the map for reference for the placement of
these.http://prntscr.com/7720ca