https://imgur.com/a/mQgeEdd

The airport boss always kills me - does anyone know how to beat him? Have tried standing outside the final area, and shooting the walkways, but there's always one spot left (indestructible), on each of the three sides, for the boss to use. I make sure that my health level is 100 before I start the boss area (as the doors close behind you, once you enter). Shooting the walkways ensures that the med kit drops to my level, but even with that extra 50 health (to top me up when I'm badly wounded), I still ha...