Once again, Adi, there is NO magic formula... Every track is different. What is the right ratio for one kick drum is totally different to another.

Often, in a mixing session, you tend to start with the drums and bass. Get the kick and bass to not fight each other (a little EQ on the bass may help, or if you want to get loud and proud(!), duck the bass a tad with the kick (if you can do side chaining - not much software can, though) or just carve a little out of the bass at the kick's fundamental frequency.

Now bring in your overheads (if you are using a real kit) and then the snare and toms. Once they all bed well, move on to the rest. It seems from your post that you already have a good grasp, but feel that after resting your ears and coming back to a project, you feel there are things to change. Well, welcome to my world! Unless a project HAS to be finished right away, I'll often shelf it for a day or two, work on another track or project, and then re-visit the first one. Usually, whatever is out of whack will be immediately apparent, and you can make a quick fix, re-export, and you are done!

Fortunately, mixing 'in the box' has made total recall very easy, so this works fine. If you are working out of the box, just try some different mixes when you export; Vocals up 3-4db, vocals down 3-4db, bass up 3db, down 3db, drums up and down, etc..

Now you have a variety of mixes that, upon listening to after a good long ear-break, the best one will quickly become apparent.

But once again, without ALWAYS working with the same drum kit, bass sound and most of the instruments the same, there is NO 'ratio' approach that will work. A pick bass is totally different to finger-style, is totally different from slap and popping. A jazz kit mixes differently to a rock kit. Rinse and repeat.

Sorry this is not the answer you want, but IMO the truth....