Just been doing GW Hotel invaded on challenge. I have 699k armour and 290k health, and am a skill build.
The final part in the foyer 3 of us were up top where the LMG is in the Hyena version when an EMP grenade landed from a medic. My armour started to disintegrate in huge chunks and before I could leave the area or apply an armour kit I was dead. Not down, but face down within a second. The medic was listed as doing 517k damage and an assault NPC 167k.
The medic in question was down below and we were in cover. It seemed like the EMP was the main source of damage, which is utterly stupid, I must be wrong. Right? BTW the medic was an elite, not veteran.