When I exit the tunnel from the train to the fort, where you can move up to talk to the guard next to the plasma turrets; I enter combat and move into the blue squares which brings me up to the platform. I do my turn, then with remaining movement go back into the tunnel. This refills my AP/MP (but does not advance turns; enemies dont act, cooldowns dont cooldown). I go back up to the platform, same thing. I can do this repeatedly to shoot everything dead.
