Interesting that this conversation came up today.
I literally just finished this entire album and dropped the release a few hours ago, and that mother brain track was something interesting.
Hopefully, I can share it with you all in the future.
But yes the arpeggios that seem chaotic and are very hard to iron down what they are actually doing with any traditional approach beyond 20th century harmony and heptatonic scales. First, it seemed quartal in nature; but then I would see a minor 3rd & #4th pop up here and there at the end of a phrase and then m6ths & M6ths with m7ths. So tons of chromatic notes. Clearly the idea was meant to sound chaotic unsettling and almost alive sounding, and he nailed it.
Not sure I could stand behind any chord analysis; but if you wanted a rough idea where to start, maybe think about Fm11 with additional chromatic passing tones of #4s and both M6ths & m6ths played very staccato in 32nd notes. Not sure how much that helps but hope it does some.
GL with the Metroiding/Jamming.
Best,
Aaron (MnG)