This event isn't under Individual Events so I will ask here: How did you get past Teir 1? All I have heard is it is up to RNG. If so, this is about as frustrating as the GAS event.
It is a really frustrating one to be sure and a lot of it is RNG dependent but you need to have the right mods as well. Try to stack up as much protection and health (and speed) as possible.