All the drums sound really solid, I'd add some more 400 & 600hz to the guitar for more mids and the cymbals sound very washy like they have no attack. Are they live or samples?
That happens ALL the time to me lol. I mix louder and louder then everything sounds dull at the end (on my mixes at least). I'd chill the compression a bit on the cymbals to let them smash more, and you'll be all good. When mixing loud, your ears get numb to those harsh frequencies of the cymbals after a while. It's always good to take a break, turn it down and listen quietly to see what stands out.
I dont think the guitars are too dark...I just think they need to come up a little. And use less overall verb on everything you used it on. The mix isnt really "in your face" Maybe put a C4 on the bass with the sneap guitar setting.