Viscaria doesn't dissemble about what skills she lacks. She's hesitant to display her Intellego, and she probably doesn't let anyone know that she's a Hermetic Alchemist, or Imbued with Terram, though it may be easy enough to deduce those (Guile 2).
Again, Viscaria is out of the apprentice discussion cuz of Ulrich's lack of any Craft skills. She'd be willing to take him, though.
Was there specific help he was going to offer? Last I checked, Korvin hadn't offered to help in any way. Perhaps he could enchant the Roman Baths to provide a healing effect?
While Viscaria showed up as part of the Tribunal Preparations hook, she wasn't intended to steal that show. If anybody wants to take a greater part in developing it, they're welcome to do so.
Viscaria's going to be focused on Rego and Finesse for the forseeable future, possibly pausing to learn Greek so she can delve into A's book.