That's up to you. When I was doing higher reps for lower weight, I would do it circuit style, each exercise for one set, little to no rest in between, then a brief break, then seto f each exercise. RIght now I am lifting at the high end for me, and I do each exercise for three sets, then move on to the next. It's really going to come down to preference. You could also mix it up and do it each way on different days.