One Pin= no chance for confusion. I have hunted with 3 then 2 and now one. I know it is different in other areas, but where I am I do not have a need to shoot out past 30 yds, so I have it sighted in at 20 or a little more or lessdepending on the set up and you can cover up to that 20yd mark within the kill zone quite easily.

IMO it is what you feel comfortable with and until you experiment you will not know what fits you and your set up.