What if we've been looking at it backwards? We've been trying to discover runes that invoke specific effects and then molding them to a useful function. Tools, as you like to put it. But, but... If the legends are true, mages aren't bound to single functions. It says the Arcane speaks through them.
I'm an Enforcer. For me, knowing how to handle this weapon means being able to protect people. To be of service to the city. And that's trophy enough. Begs the question, young Kiramman. What are you shooting for?