AI controlled helicopters are incompetent at killing each other and ground targets.
I set up two bluefor and two opfor helicopters in the editor and watched them dogfight with each other. Constantly firing at each other but seemingly never landing a hit. I even set the bluefor pilot skill all the way up. The only time any of the helicopters went down was when a bluefor and opfor helis crashed into each other.

I also set up a bluefor rifle squad on the runway with opfor helicopter waypointed at my squad's location with a seek and destroy order. After five minutes of flying over us without firing or firing and missing my entire squad was still alive.