The could just create an "Advanced Glamour" system after you reach 50 of course. Only jobs, not classes, could utilize the system.

You create your outfit, glamour it onto yourself, or just wear it outright. You approach an NPC in idyllshire (or mor dhona) promising everlasting beauty. While wearing your "perfect" outfit, the npc imbues it's glamour onto your soul stone, effectively overwriting any other glamours in place.

If you try to equip an item that is below the item level of what you have "advanced glamoured" it would say the item cannot be equipped. You would also be unable to simply unequip gear to strip. A glamour dispeller would remove it.