Ideally you would use EQS to process AI’s list of all enemies and pick the best one in current circumstances. And have that EQS query run on a regular basis. All (I guess) you’re missing is a “enemy generator” for your EQS query, and you probably could use game-specific tests, but we don’t supply a way to define those in BP yet.
Regarding team, we do have a concept of “generic team ID” in the AIModule, but it’s not hooked-up full just yet.
Cheers,
–mieszko