the parry is actually super easy once you recognize the animation... spend 1-2 tries dying and practicing it, there's a huge window to do it. when you see them doing the phase jump, just relax, sit there, and wait for it... you'll nail the parry every time
i actually found the extreme version of it pretty easy because it's a fight that, once you learn it, it doesn't really matter if it's 2x as long or everyone has 2x the damage, 2x the hp... it's still the same process.
i got my ass kicked what felt like 30 times in a row doing the regular version lol but then once i finally beat it, i re-did 3 times and beat it all 3 times in a row because i was finding it so fun

(great action and music)
so the extreme is basically the same... i basically just use rockets and parries, and nothing else, and once you learn the patterns of their attacks, they're pretty reliable to avoid.
also, use heavy armor. it'll give you a little bit of a margin of error, you can take any hit and survive, and then just kite behind the hangar (or hope on D-Walker, and strafe -- go sideways, no forward or they fuck you) until you regen
Has anybody found a way to extract the containers in the airport hangar?
Are they just there to annoy everyone?
wormhole extraction device that you build later on