I can't wrap my head around how you had less of a yield by removing shade leaves? As all you would be doing is focussing more energy into the flowers and roots rather then sustaining bigger leaves? Topping works so well because you get multiple heads but it also spreads the plant letting precious light into the lower leaves can't understand how removing 10/15 bigger leaves to allow light acsess to 40-50 lower leaves can effect your yield negatively? I have always had much greater sucsess by prunning
Why do you think that the fan leaves use more energy than they collect, or think 3x the amount of smaller leaves farther away from your light source are more efficient at collecting energy than those 10-15?
You're removing large leaves that are already grown and dont require much maintenance. They are also usually closer to the light so they can collect stronger light which equals more energy for plant.
When a leaf collects light the plant takes that energy and distributes it to where it thinks it needs to go first. It doesn't take light in near a bud sight and then put all that energy in to that particular area of the plant.
The reason you see the lower buds form last is because the plant will always put energy in to the outer part first because that is the part exposed and more likely to collect pollen, nothing to do with amount of light that area is getting. The plant wants to reproduce first and foremost. They are not concerned about the thickness of your bud.
So the more energy the plant can collect the better your lower sites will grow because it will have more energy to distribute. You're 100% reducing your yield when you take off a bunch of the large fan leaves. Why dont you grow 2 plants of same strain and remove leaves on