Most people go with a similar setup (20,30,40...). Depends on what you are going to do with your bow (targets or hunting or both).
For hunting, a single pin set for 25 yds. (hold a little under or over for closer or further targets) works well for a lot of people and there's no danger of using the wrong pin in the heat of the moment. works well out to 30-35 yds. which, at 45 lb., is probably further that you should be shooting.