Although I do not want to do anything "silly," I have found in SCN 024 the following Battle Group HQ formation:
The above is taken from ScenHack
This one is the roster for SCN 024.
As we can see, The Camo Workshop designed the Battle Group HQ formation with two units. I want to do something similar.
It could be, as SCN 024 suggest, the Battle Group HQ formation was made outside of MobHack. I note the A1 slot has unit number of 43. Further reading of the ScenHack finds unit 43 sandwiched between units 42 and 44 as it should be, as evidenced in Leaders.
I am inclined to purchase the units, then change their Formation #s in ScenHack placing them as part of the A0 (A1, A2, A3).