AI in a open world co-op game.

I'm trying to make a Co-op RPG game. And my question is how should i design the AI, the game has 8 player co-op and ofcourse i dont want the AI to be active when players are 2km away. I also need the AI the select one of the 8 players and preferably the one who is the closest to him. But once he has chosen a target he should only let him go once he has reached a certain distance. I'm not asking for any code i know how to make AI but never done it in multiplayer so my question is how should i do all this in MP.

 

Level of detail (LOD). Every so often, each AI computes the distance to all players and records the closest distance. Base the AI's update frequency on this distance. If a player is very close, update frequently. If a player is far, update less frequently. At the farthest distance level, turn off AI updates entirely until a player enters the AI's "wake up" trigger collider.

Make sure to overlap your LODs and only switch LOD when the players exit the current LOD, not when they enter a new LOD. This prevents jitter if the distance wavers over the line.

 

Thanks man that helped alot.