Forget the stretching betweeen sets, it wil make your recovery time slower and you will not be as strong. You are stretching each rep, lets not overkill this thing. Do pullups, not pull downs. Yes, shoulder width grip ALWAYS. On rows, keep elbows OUT because now we are targeting a different set of muscles. I like to use dumbells for rows, two at a time just held at my side, palms facing my calves the whole time. Remember to keep YOUR BACK ARCHED, CHEST OUT and get parallel to the ground. Also, no need to monotonize the routine. Do DB rows and forget the cable rows, and never take a narrow grip, always shoulder width. With a narrow grip you are so restricted with movement that it basically becomes a good brachialis movement and not much else.