The Division 2, Echos Of Central Park, Few Tips. Non story spoiler tips, end of campaign against boss try the Bluescreen LMG if you are having immune issues. I did this entire thing with no help online until this part, it may be bugged some are saying Iron Will causes this which I used. After beating Echos campaign you can go to Central Park mission start area and free roam, just walk past the mission setup you don’t select any options. This is very different so surprised me, thought there might be a mission toggle like master manhunts have. Nope just walk in and the game will auto start some activities. If it’s your first time like mine will be how you get new skills too.
I can confirm it’s Iron Will making Guardians take no damage unless using Bluescreen but the damage is minimal. I had the most frustrating fight with the Corrosive Trap Guardian, beat him with Refactor and Prima Donna combo. All 6 Guardians react the same it appears, so builds like Gud Will won’t work properly, just swap the chest out to Chainkiller. Best tip from my own solo Heroic Guardian is to stay around his area farming mobs to trigger him because when Guardian is hurt they run to this area. I kept having insta spawns of new mobs non stop worst than the Red Moon Unleashed event anytime he threw his skill at me. I almost think the devs purposely put in a filter for if (Chest == Iron Will) { spawnrate * 3} same for movement speed. Thats fucked up.