It is indeed bugged for Darksiders too. . I got past it because I saved my game regularly and was persistent. Atris is a ***** though. . . I beat her by fluke. Get ready for a bug or two when you beat her by the way.
Atm I'm butchering my way trough.
Guardian/Weaponmaster, all of my followers are Jedified (and I kept them from elveling up so I can give em more jedi levels...mwhahaha)
I also have my greatsabers mod installed and have bought or found the neatest lightsaber crystals. 50 damage per hit, yeah baby!
Now, if I could just get trough the damn fight.
What was the problem for you? For me, when the handmaiden beats her sisters, nothing happens. Atris doesn't come...and I can't go anywhere...GAH!
I even tried cheating by giving myself 50 wisdom and using force wave to stun all of hte sisters at once. Still no dice...