30 mastery pages, not 20
NOW!
NOW!
I just use one and make it before every games. It will actually let you tailor little things you might not have thought of before.
Eh I don't even use the 20 i have lol, Infact i'll usually remake a new page every game even if i have a page set up for the champ im playing. :)
We have a limit? Oh no... I'm almost out, I only have 2 left... better get rid of the J4 top and FIzz Mid.
Because of the large overlap in champion mastery and the free nature of changing them added to the fact you can make them in a game lobby what could you reasonably need 30 mastery pages for over any number of other things for the game they could be working on?
All my mastery pages are full, but I literally only use 3, Support, AP, and AD for bases, then just modify it slightly for the champ.