Keep moving around the outside of the arena using seize on any enemy you get to low health. The extra distraction they provide is clutch. Also the key to that invisible enemy is just to stay up in the air. It cant hit you when you're levitating so you dont have to worry about it and can take out more pressing threats. If you get brought to low health, get your Shield up and scavenge for health pick ups quickly then get back up into the air. I dont know what your loadout was but I found having Charge with a +dmg, +shield dmg, and +aoe radius was extremely good in the fight.Any tips for the final combat area in the story missions?
I've died in this section four times by accidentally falling off a platform--it's so frustrating that they don't do the "respawn with a little less health" bit that most games do. I cautiously move through the first couple sections, but the final arena is so layered with so many different enemies (including that stupid invisible enemy that pops out of nowhere and does insane damage) that I'm having a really hard time. I tried to retreat to a previous section and snipe from there, but it looks like the enemies respawn unless I stay put in the final area. Any tips?
Definitely the toughest fight in the game but you just have to be patient and methodical.