RE: Single pin sights
What if the deer is at 5, 13, 17, and 25 or 35 yards?
How easily and quick; can you track a moving deer, continue to estimate the changing yardage, remember to keep moving to the correct pin. and also make a " Kentucky" adjustment if the deer is not at the exact yardage of your pins?
Most compound bows of today can do quite well with one pin. On my compound I sight one pin in at 25 and I am set for anything within the range I restrict my shots to.