That sounds dope, really dark and has a lot of space in it. I feel what you're going for. I think that adding some thump and putting some effects from time to time on the chant would push the idea a bit further - I'm thinking of slow phaser on some of the chants, something like that. Still a dope production with clear and good arrangement.
The build up is dope! I really like the 808/Bass frequency that shit sounds crazy. I honestly wouldn't change a thing this is how TRAP beats should be mixed. Good work!!