Just doing a timing check for now; it's definitely off.
[TimingPoints]
1423,300,4,1,0,100,1,0
10987,300,4,1,0,100,1,0
20607,300,4,1,0,100,1,0
30093,300,4,1,0,100,1,0
49287,300,4,1,0,100,1,0
87695,300,4,1,0,100,1,0
126091,300,4,1,0,100,1,0
Replace the old uninherited sections in each difficulty with these. They're not perfect, but should be a bit better than the current timing (which is a bit off since duh it's a capella). You can either add them manually to each .osu (be careful of the various inherited sections, though) or by adding them in the editor (the first number in each row is the offset). Remember to RESNAP after changing the timing.
The bpm should be 200 in all difficulties, so you can fix Easy/Normal/Hard by halving the slider velocity and tick rate. You'll need to recalculate slider lengths after doing this, though (in the timing menu under "resnap all notes").
Also, I'm a bit concerned that there's three insane difficulties (two plus taiko). I'm pretty sure that the guidelines only allow for two insanes in any mapset.
I won't do a full mod at the time, but I just want to suggest that you stay away from box mapping @Teta. Your difficulties are a bit linear and seem to be lacking excitement (especially [Hard]). I wish you the best of luck!