Newf,
rep ranging don't control bulking and cutting...diet does. thats' why you can periodize in 2 week segments (if you desire) to build strength, mass, and reasonable endurance.
YOu could just as easily have one day a week be low reps, one day medium, one day high reps...then the next week change it around so a different muscle group is on a different rep scheme.
Or, you can do 6 reps constantly for a month, then change the next month.
Hell, pyramiding the weight during your 3-4 sets (10-8-8-6) is also periodizing.
But the moral of the story is that rep ranges don't 'tone' you...reducing calorie intake via your diet is what lowers fat and brings out muscle definition...a.k.a. 'toning'
Toning got coined decades ago to get women to lift weights, even if it was light weight, and high reps...it was still more than they were used to doing, so they got results.
If your diet has extra calories, 6-8 reps will build size and strength.
If your diet has lower than maintenance calories, 6-8 reps still works to lean out.
If your goal is size over strength, you can increase the reps a bit. Frankly I find size without functional strength someone illogical, but you have your goals and I have mine
