The Division 2, Specter Guardian Blackout Seeker. So the last one for me was this dood, I beat the other Guardians with a combo of Refactor, Striker, and Prima Build. This final boss kept having trouble killing his seeker, even if I jammer pulsed from distance by the time I ran back he turns back into ghost form. So finally I started playing more in range to reset skills and spawned the sniper ho who is pretty much useless but did land a couple disrupts.
Ended up beating him with Bluescreen on my Unicorn Legmo build which really impressed me. The trick was to use distance to regain skills and with Bluescreen stacks drop a skill to trigger the disrupt, immediately run and gun to him. Took about 5-6 of this back and forth and he died fairly quick and I just avoided his seeker. I will say all of these Guardians absolutely suck, I did not enjoy this one bit at all.
A real fucked up thing you can try if you have Prima Donna and Iron Will build, use it with Companion. You will almost never get a disrupt from Companion, now try this while in the fight change weapon to anything (Bluescreen what I used) other than Prima Donna and almost immediately your companion will start landing disrupts. This is not shit did it about 4 times in a row and more through learning the fight. I do not like this and it feels intentional, punishing players for gear they put into the game.
I support cheesing of these Guardians since the devs cheesed us with Guardians. After all Guardians are done you get a new game mode where you have 24 hours to contain all 5 Guardians, which should be a bit easier this time due to all the deaths I had to them. My opinion of the DLC did not improve today and may have gotten even worse.