This is all anecdotal, what happens in my tent - not a blanket statement of science
I have found that growing small plants like I do the stash doesn't grow unless you have lots of them. I veg about 4 weeks and flip. 5g pots and they have plenty of grow room for that timeframe.
Topping and leaving several branches (no crazy LST) around week three or four then letting those limbs veg for a few another week or two will double a small tree yeld with not much of a time investment.
Pruning away lower secondary limbs on those tops you save will get you a a little denser flowers but I don't think it does anything much for overall weight. The pot size is gonna determine that unless you are growing hydro.
So IMHO vegging longer and a larger pot is the main way to get more smoke from a plant without having to beat it to death with lights or nutes and the issues that can go with that.