I had 4 girls out of my pack and have yet too get rid of any of them, the other two girls I have are killer, they were the shorter pheno's and they stack rock hard buds like the best OG's. The best plant in the pack was a male, he has it all and will be making a shit ton of F2's and many other crosses real soon.
I have a really bright room, use 3 gal. Coco Hempy buckets, and feed every watering at around 1.2-1.4 EC. No secrets here, just keep my PH and ppms right, and keep my girls as healthy and happy as I can. A perfectly healthy plant is key to big yields, don't ever flip a plant till you have her happy.