I think I might still be confused. The cause of the stress is from the number of mobs it has to check. You don't want to increase the range because you think it would cause more mobs to be checked. Wouldn't it make more sense instead limit the number of mobs it can check? Because if you aggro a room full of mobs they aren't going to politely wait outside of 10 yalms. I've seen people farming have a whole zone worth of mobs right on top of them. Also why does it need to check all the characters' enmity, wouldn't you need only the enmity of the character who is the target, and the character who is the user?