I think the cheating is the point of being a magus. If you can't even make a rocket with highschool education and with magecraft, you are not even trying to win. Only less than 3rd rate magi would actually do the killing with their bare hands.
High level enemies just have to have a 'protection from arrows' mystery to defeat mundane guns and other modern tech.
High level enemies just have to have a 'protection from arrows' mystery to defeat mundane guns and other modern tech.