Why would Wax lose against an Awakener?
Its extremely rare, I would think, to come against of an Awakener of 3rd heightening and a piece of cloth against Wax with a gun isn’t going to go well for the Awakener
It takes time for an Elantrian to draw an Aon and they won’t have that time
A full Mistborn can definitely beat most Knight Radient orders, Stormlight is not limitless