[Mobhack]

I leave A0 as an HQ element and leave it on the baseline where it might be useful as an observer while it still does its real job of being the conduit to all off-map units. (if A0 is dead or running away then comms to off map units suffer).

What I never do is get it into the front lines to do something "fighty" or park it alongside things that will atract artillery (like beside an arty, AAA or SAM unit).

A0 is the "head shed" for your troops and has no business geting into fights either directly or indirectly. Find somewhere to park it safely that is away from anything that will attract attention and leave it there.