Yeah it is extremely frustrating that they don't flinch. I took lots of special ammo packs and just sniped them for a head shot from behind their shields. The enemies numbers do get a bit out of control at times. You'll definitely be safer behind those boxes under the stairs, you won't survivd all the arc attacks from those Psyhic things otherwise.
If you do hide where I'm suggesting be careful with your rockets, I blew myself up the first time I tried it by mistake. Was incredibly frustrating as had almost finished it. Would recommend sniper rifles.
There's probably a video on youtube of the spot tbh because I was pretty much invunerable there, similiar to the Nexus hiding spot on those rocks.
Found it!
Annoyingly, I do not have ANY sniper rifle! Might need to start keeping one, as I always break them if they're <Level 20.




