What do you think about this Lst and defoliaition?...

The training is fine. The defoliation is beyond a doubt a bad choice. Now, that entire barren aea is making zero use of the light in that area. You've reduced the surface area of light absorbption, therefore reduced growth potential. This is not an opinion. The misguided opinion is that somwhoe removing what powers everything the plant does is somehow a net-positive. This is bro-science / anecdotal failure. Stripping growth tips that you won't use is fine, but you can allow the leaves to remain behind and they will continue to contribute sugars andn every other function a leaf is responsible for. Stripping leaves does not in any way allow a plant to 'focus on something else' - this is a nonsense statement. Yield has little to do with number of colas after a certain point. Yield has much more to do with photosynthesis potential. Reducing that potential is not a benefit, ever. Shoot for 3-4 colas per sq ft and don't create gaps in your canopy. you'll have better results, ceteris paribus.