Main Nodes:

Russian Resolve: If you Fracture his Shield the cooldown cannot exceed 10 seconds.

Riot Shield: He loses 1 Durability in his Ablative Shield each time he is struck by any attack except Heavy.

Combat Deja vu - Weakness: Landing the same Basic Attack twice in a row puts a Weakness Debuff on you for 12 seconds.

Meet Your Doom: If you are close to him when he charges a Heavy you get stunned for 1.2 seconds.

Accident Prone: Every 5 seconds you are inflicted with a Debuff for 10 seconds. They rotate in order of: Weakness, Disorient, Armor Break, and then Special Lock before repeating the pattern.

Down and Out: If you knock him down with a Heavy you have 10 seconds to use a Special Attack or you take a big ass burst of Direct Damage.

Old Sarge Says: 

• Pretty easy fight for Chee'ilth. Her bleeds are potent. Just don't Heavy unless you have a SP you can launch quickly (I just saved for SP3). And you will Fracture his Shield a lot because of the Riot Shield node- so expect to be stunned a few times. I think Kingpin would ramp up nice with all the debuffs from Down and Out node. 

Civilian Intel: 

• Sinister for red guardian

• Okoye

• Red Guardian can be easily taken care of by timing the sp1 so that the last hit  breaks his shield. You won't get stunned that way. I did it with Isophene

• Chee'ilth

• Crossbones (Black Widow Relic) Nick Fury also cleared it but having the dupe and second life will help due to the Shield break from RG