Hey mate!
In my opinion, and I personally, do all the techniques that you mention.
First of all I would do some l.s.t in your plants right now, to open the plant and create a bigger canopy, and the bottom branches gonna get bigger.
1. Tie down the main branch
2. Tie the secondary branches to open the canopy
After that I would remove some big leaves that are blocking the light to pass for some lower branches, you can prune too the little branches that you see that don’t receive almost any light.
You can also topping to stop a beet the aptical grow and boost the grow of the secondary branches.
After that I would wait maybe 10 days or so, for the plant bushing out. Past that I would put some net sccrog 15-20cm above the branches. When the plant reach the net I would try to open even more the canopy.
A week after the 12-12 schedule try to lolipopimg and remove some extra big leaves, let the girls recover and when you move the light schedule they gonna strech a lot 🤙🏻
Wish it helps!
If you need some more help just send a message!
Cheers !