Just a question, why don't you level up to Lv 13-14? There's no reason not to. If you're concerned about spell picks, those can be saved for any next level-up you do. With Lv 13 or 14, the water caves (which I assume is where you are, the sea caves are further on) should be doable.And you can knock Vi and Urq unconscious and drag them in. They'll suffer on their stats, but at least Vi should stay a decent fighter (er... Valkyrie).
-- The Duke