A basic infighting system is in place.
When a monster is hit by an enemy it “tags” it as Target and a Timer
During the time the Timer is running the monster will only focus on that Target even if it’s hit by another enemy, including the player.
This happens until the Target is killed or the Timer stops. Then the
player becomes the new Target.
In that moment if it’s hit the cycle starts all over again.
The system works well and it made me realize that the actual AI needs tweaking.