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I shoot an Outback , 70lb. draw maxed out to about 73 lb. I use 1 pin set for 27 yards. I can shoot out to 60 yards with it. I have been shooting this way for years. I just know where to put the pin on the longer shots. But the farthest that I have ever shot a deer was 31 yards. Once you get a feel of shooting one pin it is great. Makes it alot easier when the moment of truth comes IMO. I really like shooting this way. Once you know your bow it is really easy.

none

The 3d shooting is the difficult part of this question.For hunting purposes in most instances with a flat shooting bow,one pin will be sufficient out to 30 yards.A less obstructed sight picture and one less thing to think about while dealing with the adrenaline.Two pins will do quite well out to 40 to 45 yards if you have practiced sufficiently,say one at 20 or 25 yards and the other at 35 or 40 yards.A 25 yard pin should be able to be held dead on at 30 yards with out to much concern.My preference is one pin set at 30 yards,I am very confidant to all ranges I am comfortable with with this.
On the 3d course if you want to shoot in a fixed pin class I would still want some decent gaps between pins so that I could see clearly.Ten yard increments such as 10,20,30,40,50.Or an adjustable sight with one pin.

I use just one pin for twenty yrds.I don't shoot past thirty so I just aim accordingly. I like to keep it simple.

1

I recently removed two pins from my old Tru-Glo 3 pin sights (20,30,40) and just left it with the 20 yard pin. My new bow is fast enough to handle only 1 pin to 30 yards and I don't want to shoot out to 40 yards (yet, as I'm still getting to know my new bow).

I use NO pins on my compound!!!

1 pin a right handed HHA Opti-pro lite on a left handed bow it comes from the top down.

3 pins! 20, 30, 40 for me!