Mastery 8

I do believe that the S+ only requirement won't be a good thing for the simple reason that ppl will exploit the ranking with unusual positions (like Yasuo Support). This will just increase the overall toxicity as ppl will just have to cross their fingers in hope that the really unviable teamcomp gets somehow a devastating game.

As the ingame stat tracking gets better, I believe that Riot will find some other hidden or less hidden criteria to give players a Mastery boon.

There should not be s ranks needed. just a lot of points. looks to similar to 6 and 7

It lools cool but i hope riot are done with mastery on champions. It doesnt show you that you are good with the champ and most people just use it to spam mastery level 7

They need to make it purely mastery point based and get rid of the s requirements because they're so hit or miss (imo). Get them crazy easy spree games, impossible to get I'm others. It is "mastery" after all. 300k for 8 doesn't seem like enough. Personally, I'd make it something like 1m for 8 since it would probably be the last tier, and I'd want it to be really grand.

There should also be to upgrade it you must have over 50 or 60% winrate on the champion, if it drops after you've upgraded it you will still keep it though.