Very nice arrangement Jonathan, I really like the choirs!
As the present said, the ending is superb.
Mixwise the individual elements seem to be mixed together really well, but there are some bumps in the total frequency response that might result from mixing on your earphones. Mostly a lack of highs I think, sorry I can’t be more specific.
I too really like my Soundmagic inears, they sound really good when listening to music, they’re comfortable and they exclude a lot of background noise. Never tried mixing on them though 
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