I'd pick one main movement (eg:bench) for lower reps (5-6) and then shoot for some incline db pressing at mid reps (10-12ish), then hit the cable cross over or dips for higher reps (15-18ish). So, what I'm saying is use your main movements (squat, bench, row, deadlift, push press) for lower reps and use the assistance stuff (incline db, 1 arm rowing, hamstring curl) for high(er) reps.