Hello Ben,
What I usually do in this kind of situation, asuming that they are already loaded in the >dataframe<, is to "re drop" them secuentially in the desired order (drag them again to the view). As a rule the dropped layer will always be on top of the rest preserving the style that they had, so this becomes a reverse sequence somewhat easy to handle.
I know that th ideal situation is to have a proper context menu/dedicated button for this but I find this drag-n-drop easier than manually editing a *.EWS file.
Regards,
José D.