Thanks so much for doing this, my question is about low end theory 
bass guitar in particular, without having to turn up the guitar and it clash with other elements in the mix , how do I make it be felt more rather then be louder if that makes any sense 
Try to mult the bass guitar and then filter off the high end, then compress it. You’ll get a leveled parallel low end signal that you can mix in to taste to give you that effect you’re talking about