Thank you for listening and your feedback!
I was a bit unsure how this would really fit a boss fight but after listening to some different tracks from Dark Souls I noticed many of them were focused on atmosphere, timbre, and mood instead of a more typical high energy-intense boss theme. For example, Moonlight Butterfly, Pinwheel and Bed of Chaos to me have a different vibe compared to something like Asylum Demon or Bell Gargoyles. Also, I think I went with a more DS 1 (Sakuraba) kind of vibe compared to DS 2/3 (Kitamura) vibe. Next time I'll for sure try to have a section that makes the listener sweat a bit more and a bit less march-like. One step at a time I guess :P