Is the Apoc Boss Rush Gauntlet last 2 state damage too high or buggy ?

[$n@il th3 $l0w]

2-player Apoc Boss Rush Gauntlet, in state #18 and state #19, the boss always two-shot me.
I have 156 Health, 60.4% DR and full Medic shield on.
Anyone have the similar experience ?

[Fat Cat]

Bosses get stronger the further on your make it through boss rush. They have more health and deal more damage. Don't compare the bosses in boss rush to their campaign/adventure versions.