00:02:586 (1,2,3) - because this is a part of the intro, spacing should be lowered (or even better, replace with reverse slider)
00:06:023 (2,3) - the same intro part, i suggest stack these objects and separate 00:06:804 (1) so the difference of music is clear
00:15:086 (1,1,1) - spacing must be lowered because these have a different rhythm than the others
00:20:711 (1,2,3,1,2,3) - since you already use new combo technique in 00:20:086 (1,1,1,1) , do the same