Depending on the speed of your arrow/trajectory, you may consider a 15, 25,35 pin. Most shots are right around 15 yards. On a slower bow (I' ve owned some) You could realistically have a 10, 20 and 30 pin. So the 15 yard pin would be a good compramise.

Plus trying to remember to aim lower on a sub 10 yard shot while using a 20 yard pin might be forgotten at the moment of truth.
The last arrow I sailed over an 8 points back becasue I aimed with the 30 pin while he was at 10 yards (I was UP there +25' ) caused me to switch to a pendulum.