Rep ranges look good to me

In very simple terms 4-6 is strength rep range and 8-12 is hypertrophy (muscle size)   -  there's more to it than that but that's vaguely it

I'd do your big compounds in lower rep range, so your squats, deadlifts, overhead press I'd do 5x5  (possibly bench as well)   -  Powercleans I'd keep as you're doing them (though maybe 3x4-6) as they hit your body/central nervous system hard so you don't want to over do them (also you don't want your form to slip on higher reps of high weights as it could result in an injury)

For your isolation/supplementary exercises do them in the higher rep ranges, so your curls, close-grip bench etc. in 8-12