>>136302
Do the variations man. Bulgarian split squat, cossacks, box jumps, sprints, leg extensions and curls, back extensions, leg lifts (hold a plate between the ankles), romanian deadlifts (bb and 1 db at a time), soccer with a medicine ball (juggle, kick, basic soccer drills, etc), and some martial arts where you practice side, front, back, flying kicks. Oh and don't neglect grip, jaw and neck training, that can give your body more confidence and something something physiology. Its been shown that lifting with your mouth open makes you much weaker, so weird shit like that contributes. Wear a mouth guard so you can clamp down when you lift. Train like you land on your neck/head every day for a living, and you punch concrete bulls to death to survive. Shouldn't interfere with your squat progress.
Variety my man, variety is its own crushing stimulus and will hit your weak points. Don't neglect the ole front squat either. Back squat 2x a week. Sets of 25+ the first two weeks, 12+ the mid two weeks, and bring the volume and variety way down 2 weeks before the lift, and up the intensity on your back squats (MORE WEIGHT). Go for sets of triples the week of, and don't lift the 3 days before you have to test it.