Idea for Improved Mastery System

Sometimes its a little frustrating only being able to have 20 different mastery pages. It just doesn't feel like enough most of the time. I think maybe each champion should have 3 mastery pages available. So you can set up multiple pages for different positions with said champion and not have to worry about running out of room. Just like you can make as many item sets you want for a specific champion. I just think it would be an improvement and allow for a greater experience overall. Please leave your comments below and tell me what you think.