[Imp]

In a big game full size map have used to good effect in a city defending a flank.
The hard part is avoiding arty so let him think that the move is undetected then he might not telegraph it with arty fall.
Once he has run into you they can slow the advance drastically, wont get that many but you are buying time & possibly resources as he calls arty over. Lets your force get local superiority in the main fight & can use them with main force at junctions.
If tanks have TI place one of each covering the junction, RCL nearest as inacurate & if its killed tank can still fire, if he fires at the tank your RCLs going to get another shot.
They can also move the 1 or 2 hexes to the junction & try there luck after main guys have drawn fire.
Only any good as a delaying force but as cheap the big boys are freed up to attack.
You need to be pretty confident you can take out any helos first or at least hold them off or they are cannon foder.