If you don't look too close, because AIs from all games will do stupid things, the one in ArmA 2 OA is more than decent. Most loved AI trait in my early days after installing the game: how they fire and maneuver against the enemy. Most hated AI trait this past week: how they fire and maneuver against the enemy ...
I'm trying to edit scenarios where the AI defends from the relative safety of a sandbag bunker and the first attempts have been frustrating.
After some Googling I found some old threads in several discussion forums. All good information, most of it beyond my grasp. So, I'm settling for a relatively simple way to get the enemy AI within the bunkers and them to stay there.