It is going to be Red Mage, because you are just overthinking it now. They wore a Batman shirt and a 007 shirt for the last fanfest which equated to Dark Knight and Machinist, not Caped Crusader and Double Agent. So it's best to just see scarlet witch for what she is as a whole, she wears red and uses magic, there is no more complexity to it and no need to because they are just repeating what they did last time, the dark knight and a secret agent known to use guns/spy gear aka machines/technology.