the things you can't control - genetics. Not all plants will form donkey dicks. Not all plants are heavy yielders - donk dicks not required for that, either, but obviously help.
The light provide correlates to a particular yield (relative to all other important factors)... how many budsites is how it gets distributed. There are plenty of behaviours that can reduce that, but let's keep it simpler for this conversation.
You grow one primary cola and you'll get bigger buds on that cola. the weight will by similar to the same size plant as far as energy absorption iwth more colas and level canopy. Maybe, a level canopy can eke out a bit more, but again, let's keep this simple and on-topic about the gist of this. So, if the number of colas and such result in a ~20g potential mass per branch and you have a bunch of axilla underneath, you'll get a little less of that mass up top -- again, this isn't necessarily 1:1 but its not far off due to how a deterministic reality works.
When you harvest assess thse lower axilla.. do you see any point where the quality really deteriorates? Try your best to prune it so you only get the growth above that point -- much more difficult than it sounds due to diversity of one plant to the next. might take a few grows to dial in what you want. and, what yo want may not be congruent to other peoples preferences.
e.g. i just started making bubble hash again, so i want some larf at the bottom from now on. i'm re-learning where to prune off at the bottom that leaves a proper portion of some okay buds and a little extra larf than recent history. another grow or 2 and it'll be dialed in again. I was pruning for little to no larf before.. probably hurt overall yield, but i wasn't using that middling and lower growth before.