Use heavy weapons or high-damage explosives
Aim for weak points and exposed components
Keep moving to avoid its attacks
Use cover to break line of sight
Focus fire with your squad if available
Bring armor-piercing or anti-robot ammo
Use stun or crowd-control tools to create openings
Destroy nearby support units first
Attack after it finishes a big attack animation
Stay at medium range unless you have strong close-range damage
Resupply before engaging
Retreat and reset if you get overwhelmed