She could actually forge some armor, such as a breastplate or scale mail, and with an enchantment or two to boot. But there's actually a superior armor/weapon smith at Watch named Harnel which you might want to look into. Just have your character pop into the thread. Cornelia's mostly all about guns, though they are of a primitive variety.
As for Watchtower, well, they save the world. Not that the world has needed much saving lately, so mostly they've been downgraded from apocalypse-averting to your average do-gooders.