Originally Posted by Paradox
Personally, I think the best assistance for squats is more squatting. More back squatting, at that. Next best, front squats. I've been front squatting a lot recently and I think they're having a very nice carryover to my back squat.
^That...in the past the only thing I used to chance was the stance... maybe a cycle with your personal competition stance, and 2 more different ones either wider or narrower on other cycles.
(or alternate stance every week)