MIX - REAL STUFF

I wouldn't say overpowering - they sound evil and could come down a db or two, but I think the brightness/top end grind is a bit much for the vocals/drums. I'd personally opt for making those brighter vs dulling the guitars though.
 
https://www.dropbox.com/s/k3ktn9cx7k59bvj/catharsis mix master mp3?dl=0&s=sl
did an attempt on mastering and i only think the toms could lose some weight somewhere so the limiter wont pump those lows in.
otherwise i think its a nice mix:Shedevil:

edit: sounds killer but i still got some pumping going even with slightly less limiting.
https://www.dropbox.com/s/77gbxjolill1ru8/catharsis mix02 master.wav?dl=0&s=sl
not sure if multiband helps here, but you gotta spike the toms through anyway.
sometimes sending the toms to a separate bus from the main drum bus helps me in that because you can fine tune em much better.
automating low frequencies when they hit constantly can also be a solution. but im not really sure if i would touch it now a nice manley should handle this any day.