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try different (brighter) hi hat samples, perhaps even gating what you have, that pattern sounds really ugly and takes up far too much room in your mix.
your growl sounds need to be bought up in the mix, otherwise get rid of them.
there's a lot of percussion going on which isn't a bad thing at all but sometimes you need to keep things in check as it can get a bit messy. percussion levels are a bit off in places too.
sub could do with some beefing up.

other than that, you've got all the bits of pieces of a decent "dungeon" style tune. well done.