The most vigorous, high-yielding plants are from regular seeds, not feminized. That’s the first thing: genetics.
Next, for pure yield the fastest method I know of is this: find a plant whose genetics you want to work with. Keep plant in veg as a Mother and take clones to populate an ebb and flow tray. Veg clones for 2 weeks then flip to 12/12. Roughly 60 days later, harvest and repeat.
The downside is you have to keep a separate space for keeping plant/s in veg.
This is what I’m currently doing now. Harvest every 75 days.