These end-of-the-week leg days are no joke. Not only do you have to put a huge amount of effort into your squats, you have some crazy BFR work to do afterward. Although your BFR reps won't be heavy, they're going to hurt like hell as you're doing them!
Leave your wraps on for the entire four-set cluster and make sure you take 30 seconds of rest between each set. If you can't hit the prescribed rep range, the wraps are too tight or the weight is too heavy.