That choir sample instantly reminded me of Delerium. Drums sound pretty much spot on. I feel some of the FX are a bit loud in the mix in the first minute or two, they shouldn't be as close as they are to your vocal samples in volume.
After 1:15 you get a bit atonal, and while I understand this is an experimental piece, I feel you achieved a sort of unity up to that point, and went a little to far there, then you come back to unity around 1:30-1:40, I really like the rising tension at 1:40+ I like the extreme StarCraft-like distorition at 2min, and the beat that follows is a nice ambient piece.
The drums really unify it at that point. Again some of the FX are pushing the volume a bit, but not by much.
I'm partial to experimental stuff, I like this track overall. I like that you understand the importance of reverb. And I mostly appreciate the vibe of this song.
I think the composition could be a touch tighter, and that your mixing could also be a touch tighter, mostly the things I mentioned here in this review, great track though and I appreciate it.