Simplest way to explain it. You=rusher, and some1 without ancients wants to go to next difficulty. That person stays in town and doesnt move. Now you need someone who can GET INTO WSCHAMBER WHILE YOU KILL BAAL (that person has to NOT HAVE DONE THE BAAL QUEST) once baal is dead both members of your party should have quest... this is refered to as a glitch rush.