If you want a recomendation, you can try making it an event that gives you a simbolic Key Item and activates a switch rather than a specific equipment, and say your character automatically equips one of them
Like : "12 Sword Sisters! - 12 Swords that can be used for the party to master the [Swordancer class]"
And then say each member can use 3 of them, so its a full party of 4 and each get one
Or "The crest of Nobelty" and write "Symbol of mastery that shows mastery over Paladin Arts"
Something like that