Add new in-game icons for star 'levels' that range from under 100 stars to 500+. You can cap max stars at 500 or not it doesn't matter a ton. Bronze, silver, gold, platinum, and a blackout version. This is just a suggestion for more visual variety in servers, but I think if you're adding Class Mastery in the future it could be a good idea. You can add star outlines and custom colored nametag rewards for mastering a class! For example:

• Vampire Mastery: red star outline + red Vampire nametag
• Conductor Mastery: blue star outline + blue Conductor nametag
• Zombie Mastery: green star outline + green Zombie nametag
• Necromancer Mastery: purple star outline + purple Necromancer nametag (the Necromancer class desperately needs a rework btw, nobody uses it)

I attached a concept image for new star icons below, please check it out!