How to make the ai not all attack me

[Miravek]

i'm making a maze type map where the player is trying to get through it with a bunch of enemy units moving through it.

Problem is that if the player engages 1 enemy unit, all of the enemy units rush to kill him. How can I make it so this is not the case?

 

[Death Adder]

try changing the call for help range in gameplay constants