Anyone have advice at this point regarding LST / defoliation?

Hello buddy... first advice for the futur, keep in mind that more you give lot of informations, better are the possibilities for u to have good answer and better diagnosis. this plant is so complex sometimes that it could be difficult to be precise for a grower to answer you properly. 👍 your nutes schedule for example is strongly recommend to indicate... is your led has a dimmer ? how work your watering system ? solution ? with a pump ? settings ?....etc etc without these elements....it is more a "crystal ball" diagnosis 😏....if i were near you on your tent i could be 100% affirmative...so you told that u keep the pH to a good range ok but.... i noticed some indexs..... are you sure of your pump watering settings ? i mean now they seems droopy.... it could be one raison wich can explain a lot of others. auto's are much more sensistive/fragile to all stresses than photos or regulars ! so too much water, or a soil too much wet all the time can slow down the growth....due to the lack of oxygen in root..... and it is a vicious circle.....😷 😜 cause if you feed her, she will loose habilities to absorb correctly some elements and micro elements and she will go to a lock out process (on your leaves and on others plants in your tent )...etc etc....try to let roots breathe a bit.... in other hand if your led is a 453W (from the wall ?) and you didn't have dimm it correctly of you dont have any dimmer....the right height must be find....to ensure a grow a bit better taller..... branches and main stem need a lot of water to be build 😏... don' t hesitate to mp me if you want to give me more information... lst is a good thing to do a low stress training but u have to be effective on the overall growth of the plant.....to ensure the best yield at the end! i am not an adept of defoliation due to the very specific short cycle of autos (only in the case of fluxing techs)...... especially for the flowering time. the leaves acts as a tank for nitrogen and semi/mobiles nutrients. you have to know that when she starts to flo the plant loose their habilities to properly/ totaly absorb N....and leaves can be a good partner if you dont feed correctly at the veg stage.... a lollipoping is to my point of view the only thing to do to ensure a better concentration of energy on upper buds.... the last advice i can give you if u don't know it already.....is to have a good soil mix ! auto's most of the time have low demands than photos especially in veg stage....u have to cut your light soil for example with coco or perlite or vermiculite....or a mix of tree.....u cut close to 40%.... even 50%..... depend of knowedge of the strain needs....it will ensure you a better penetration of roots and a bigger plant.... when the flow starts go easy with nutes from the beginning to mid flow....after that u can use more pk hope this help 👊 Happy growing buddy