My Sancho is doing 5.5k Blizzard Vs with MM/Beyond/Ultimate, and the only equipment that boosts Automaton magic I have are the MAB Taipan Fangs +2 (10 MAB), Cirque Legs +1 (5 magic skill) and Cirque Scarpe +1 (10 Int).

Of course, that's with 3x Ice maneuvers and both Loudspeakers and the Ice Maker, but I'm still wondering why you don't get higher Aero Vs.