The dissonance you create with these voices remind me not of a traditional chant per se, but what I would imagine could be heard in Dante's iteration of Purgatory. It's haunting, and it evokes to me the many souls still waiting for sweet release into Heaven. And then when the pads come in, it reminds me of those cold, freezing atmospheres that I'd heard in Tekken 4 and stuff. I used to love these ambiences; you brought them back to me once more.
No complaints about mixing; as far as music is concerned, you have given me a piece which strikes me as unforgettable. And not only that; I can come up with imagery so profound. (As a personal side note, you have also inspired me to pray for the release of souls in Purgatory. Thank you.)
Insta-favourite.