Much too Much Flymix

[Joza]

I was thinking about trying that duet thing too, but really I dont think you can have them apart by constant number of semitones. You need to tune every voice to stay in scale and make sense. And still I'd probably use it only as quiet background harmony effect.

Otherwise in my opinion:
-partly boomy and erratic bass
-a bit too wide brass
-more reverb in vocals needed, and the take you chose has bad faults in it. if you want to use that one I'd replace at least the failed parts with the other take.