The best strategy is layered defense. First, install early detection sensors—radar and visual nets—so you know the threat before it reaches the city. Next, set up a perimeter of energy‑shield generators that can disrupt a robot’s power core. Inside the city, establish rapid response teams equipped with EMP weapons and anti‑mech armor. Use decoy structures to lure the robot into a controlled area, then deploy drones to isolate and disable it. Finally, keep constant communication with all units so tactics can be adjusted in real time. Efficiency and speed will reduce the damage dramatically.