Only one person made it out of that hallway concious. A table full of of edge burnt was ruled as Lothan and a few others showing up as cavalry, with Lothan holding the Founder off while CASEVAC was done.
That said, the runners did happen to all group up very politely at the barrier spell during that initial parley. They underestimated the danger, and it's fully on them. Tough encounter for sure, but very fitting for Shadowrun imo. Play smart or spend edge.