1-3 damage weapons on a low crit job, either naked or wearing gear with low dex + high haste to minimise the chance of criticals and breaking their weapons. If they successfully pull off one of their weapon throwing moves it 1 hit kills the doors, even with that the weapons break easily and it's a real pain of a mission.
Also finding the ring assault is very difficult solo, I've never had to experience that as I'm always dual boxing.