I'm going to be GMing the Rise of the Runelords adventure path, but rather than having 4 players, there might be 5. Originally I was going to have people make their characters using 20pts, or 15pts if we have 5 players. But then I read something that made it look like the adventure was based on the characters being 15pts. So I'm wondering if I should lower the points a little bit if we have 5 players. Thoughts?
Edit: In case it matters it's the Anniversary Edition, so single hard back book with everything retuned for Pathfinder.