The big open air bit in the Forerunner level where stepping into a Banshee appears to alert the entire battlenet of your existence is doing my nut in. There's nowhere to hide. The furthest I've got is when my Ghost somehow survived an insane multiple blast and shot to the top of the structure in the middle intact, where I exited and headshotted a couple of Elites. I crouched and waited for my shield to recharge, stepped out of the shadows and got mullered. I've been attempting to do this bit on and off for the last few hours. I've lost all my Halo skills Heroic used to be my fallback 'I just want some fun' difficulty level.