Change the way the AI works? (Need an opinion)

Not to be "that guy" but this is a question that would be best for the forums because there's no real answer to this due to it being based solely on opinion.

IF you're asking how to make the player die by looking at an enemy then that's completely different, and completely do-able. Even a simple raycast would probably suffice:

             float damage = 0;       // Damage dealt to the player by looking at the enemy
             Transform playerEyes;   // Eye-level for the player
             float playerHealth = 0; // Current health the player has
             float distance = 0;     // How far away the character can see
 
             Ray ray = new Ray(playerEyes.position, playerEyes.forward);
             RaycastHit hit;
 
             if (Physics.Raycast(ray, out hit, distance))
             {
                 if (hit.transform != null)// If the transform exists
                 {
                     if (hit.transform.tag == "Enemy")// If the transform is the enemy
                     {
                         playerHealth -= damage; // Apply Damage
                     }
                 }
             }

To answer the actual presented question, though... it's impossible to say because I know nothing about your game :(

I'd prefer an AI that took more then a minute to code. One that gives the semblance of making intelligent decisions based on the game situation.

AI code downloaded from the net falls pretty low on my list of games to play.