We have a Wizard apprentice in my game who has a Winter Court artifact, and an Aspect related to it. However, since Refresh is such a premium for spellcasters, we built it as an Enchanted Item (using his normal focus item slots) instead of an Item of Power. It is rules-legal, but plot-sketchy, thematically, because it is (plotwise) not something he "built." That said, if it is ever taken away, it would "free" those focus item slots.
Canonically, there was only one Wizard out there knocking out all the Warden's Swords. I
think (disclaimer: it is Monday morning, I'm exhausted and I don't have my books) those were put on most of the NPC sheets in the way you listed here.