You really need to alter the behavior of trucks.
They are madding compulsive, and suicidal.
For example, if a enemy tank pounds away at wall, the truck will rush to that side of the wall to be killed by the enemy tank.
Truck Engineers can't sit still. All the time moving. They move faster then you can right click, and say hold position.
At times, it seems hold position does not even work.
They commit treason too.
As a enemy tank, pounds away at the wall near a gate, the truck will come out , and let that tank in.
Send that truck to prison for a hundred years!
Is there any fast fix to this?
Like a mod, or modify the AI script, or something that can be done?