What i want to suggest is, what if a character gain additional costume style if they move to the upper circle?
So we could see slightly different version of the costume instead of the same looks with those that only took 1 circle in a specific class.
For example, a wizard that advance to the 2nd circle will gain additional color in their costume and maybe the outfit changed a little bit, and then if they advance to the third circle their robe change into much more majestic form.