Thank you everyone for your advice! I am definitely learning something new from each track, and I always learn something new from posting on this forum. Actually it's interesting because originally the whole mix was more balanced, and then I made a last minute change by turning down all of the instruments, but maybe it seems I didn't go far enough, and actually the drums and bass should be proportionally louder again. I really need to get a bit more technical with mastering, my only real technique right now is to route each group through a different bus and then route all buses to a master bus, and then I add a Sonitus multiband compressor to the master bus. Most of the actual mixing is done by simply mixing the output volumes of the buses. Anyway I think I may try to remix this and make it even more hardcore. Also I think I should try and add more instrumentation, maybe even an actual lead, but then I really don't know if that's the right thing to do if I'm trying to position this in the House genre. Anyway thanks again for your feedback everyone :)