You should use a reference track and try to match the same levels + a visual analyzer like the free Voxengo
Span. And yes you're right, we don't perceived & react to audio the exact same way all the time and it's a tricky one.
There were lot's of harmonics in this area, so yes, it was quite cluttered & busy and this cut helped to remove some muddiness
This one is a rather deep cut with a narrower Q factor because it aimed at taming that percussive sound that I found to loud and quite resonant. Not taming this frequency and then going to the Multiband Dynamics comp & the Saturator devices would have cause problems. You can activate/deactivate each device ( assuming you're using Live ) in order to A/B what they do to the track.
All of this was done very roughly of course. You can't fix everything on the Master Channel but hopefully it gives you more visual elements on some possible issues and will allow you to go back to each channel & make some adjustments, but again it's good to use a reference track for things like levels, frequency spectrum & curve across the all Mix and a visualizer like Span is also quite handy then.
For the bass, you might need to go back to the preset/sample and check things like initial level and the cutoff filter ( if synth preset ) and then any soft-synth internal effect or post effects you added yourself like comp, distortion or saturation. Then EQ it to get rid of the unwanted low frequency range. I had to cut and tame quite a lot in this area and the Multiband Dynamics device I added after the EQ was mainly to bring back punch to the low end. You'll hear this if you bypass it.
So in the end, it's more about mixing issues per track, right from the start. It's important to pay attention to levels and to use EQs and filters to get rid of unwanted frequencies and to adjust the sound right from the start. If you apply kind of the same broad cut under a certain frequency on each channel you won't really solve issues, the sounds that were maybe fighting in a certain frequency range will just have less space to fight but will still be dueling if you get the picture. You need to be a bit more chirurgical per channel and when cutting or taming frequencies, it's also good to compensate the loss by boosting the pleasant harmonics in an upper range freq. of the same sound.
Hope this can help and it's a nice easy listening track