[Imp]

As others have said why play him if asked him to stop doing so & he persists. Lots of work as he has to cross attach the platoons & rebuild the formations & I have never come across it.
Though I do use something similar mainly for campaigns but on occasion for 1 off battles.
If artillery for the side I am playing does not have a Company level force or the company leader is a FOO I will buy a company & delete all its units. I then assign all Artillery & AAA to this guy, my arty park commander if you like.
Simply done because assigning to other frontline formations means large distances between commander & arty park