Today I tried some of these suggestions, instead of focusing on 5 reps I did singles, adding weight until couldnt make the rep. I felt fresh throughout, stopping at 200lbs and doing 3 reps, higher than I expected. Ill stick to 1-3 reps for the heavies for a while and follow it up with a high-rep finisher.
Pause squats are killer, I paused in tension for 3 seconds at the bottom at 135lbs and definitely felt the hip strain, but in a good way.
My weakness is definitely at the bottom of the squat, I can tell if Ill make the rep just by the way I go down. I remember one time I didnt even bother trying to go up, I literally unracked the weight, and squatted straight down into the safety pins without even trying to push lol. That got me some confused looks.
My knee to toe is pretty short, but my knee to hips is long at 6'0, so my parallel is extremely low. Theres almost no difference between going to parallel and going all the way... Ill have to find a comfortable stopping point where I can keep making progress without hurting my knees.
Thanks again guys.