No, I don't think you can define any of those ratios. It doesn't really matter. Just train all the major movements, and then synergists and stabilizers with get as much training as they need. They don't need as much training as the prime movers for the major lifts.
So just to be sure I understand you completely, you think I should only focus on the Targeted muscles in the exercises, when I make my workout schedule?
But what if I i.e. have 5 exercises with the biceps as a synergist muscle, then I still should have an exercise, where I have the biceps as the target muscle?