Underworld Failure, not sure why?

So lately I've been running my friends through UW up until the point to where you get the first/easiest Black Widow after the quest, "Wrathful Spirits".

I've done it multiple times and twice, two different UW trips, my group has some how failed. Causing us all to die, etc.

Both times I've checked, making sure both reapers were alive, as well as the mayor. And both time, the Mayor, and the Reapers were still alive. And recently simply to rule it out, we were still fighting the tortured spirits and the torture spirits were still fighting amongst themselves as well.

-We used EoE, but stopped using it while we were doing this quest, so we didn't kill the Mayor, etc.

http://i42.tinypic.com/157zv5d.jpg

That's the first time it happened.

It happened again several days later, and I wish I had a screenie of the Mayor and both of the Reapers being alive as well as Allied Tortured Souls, etc.

Can anyone shed any light on this?

too many of the tortured spirits died would be my guess

edit to make it simpler the green 1's not the red 1's

You need atleast 1 of the "safety" spirits alive, that means 1 Allied Tortured spirit

Both times I've died, there has been at least one. As you can see in the above picture, there were about 20 left.

In the second run through, we had only JUST started the quest.

Yeah, its because the tortured spirits have died. The problem with that quest is that there are groups of tortured spirits that spawn before you take the quest. They spawn when you kill the grasping darknesses in the area. These are what are dying. If all of them die, then you lose. You have to kill all the graspings very quickly, and kill the tortured spirits when the quest starts very quickly so they don't kill your "fail spirits".

It's been a while since I've done that, but it may be a matter of killing everything along the way. That is, as you go through the UW to get to the spider, make sure you kill all the mobs - don't try to avoid them. There may be spawns that are then killed by the enemies you left alive.
But, as I said, it's been a while, so you'd need confirmation of that - and of course, if you [i]have]/i] killed everything, then I don't know what to tell ya.