First Grow w/ Bubba Kush

Question: How much defoliation is too much and how often is too often? I've done it twice in 2 weeks because the undersides of the plants where getting out of control and not getting any airflow. Week 3 Flower: Did a defoliation and lollipoping heading into week 3 of flower. Buds are starting to form on Bubba pheno #2 and #3, pheno #1 is starting to develop pistils...finally! Pheno #1 has been behind about a week for the entire grow unfortunately. For my next grow I'm going to buy more seeds and do more of a selective process in the seedling stage to try and achieve a more even canopy. I should have realised and noticed this sooner but... I just noticed after a few weeks after the super cropping that the branches that were below the super crop shot up like crazy almost to the top of the plant and the ones above did not. In learning from this I'm only going to be super cropping just above a node to encourage branching and achieve more tops on my next grows. I also changed around my lighting since the heat from the 400w HPS at 75% was pushing my temps over 90°F. I got rid of the 100w LED to make space for another 4inch inline fan to draw in cold air from the outside over top of the HPS light. My temps are now sitting around 70-76°F and the HPS is at 100% so I couldn't be happier with the outcome. The Dyson fan was also removed because it was causing some wind damage on some of the plants and was replaced with a 6inch WindDevil that is placed just above the top of the canopy. Reamended the soil, 10g/plant of FlowerPower Bio-PK Booster. Watered at a pH of 6.5 with the Pro Cal (4.5mL/gal), Liquid Weight (4mL/gal) and Rezin (8mL/gal). Ended up watering each plant about 1.5gal of water.