The idea is basically how to make allies or enemies Coordinate their actions together for both movement and actions, for example, AI in games like in final fantasy 16, where they seem to be able to Coordinate together (healing, attacking), the topic could include the following, it is a kinda big and large topic and aim for pepole who want to master game AI , it could be breakdown into series.
movement, navigation, and pathfinding
State machine and behavior tree
single or character and crowd or Meta AI.