Medallion of Dominion scenario

I’m stuck in phase 1 of this scenario in the Necropolis where I need to interrogate Adept Necromancers. The mirror has transported us to what appears to be a balcony with spots on the floor that stun and mini tornadoes. Dodging these, three Adepts have been encountered, all died under interrogation and no more have been found. There doesn’t appear to be a way to get the lower level other than jumping. As a rogue with safe fall, that should be doable but I suspect that really isn’t the way down but there are no more Adepts to interrogate where I’m located. Was I supposed to stop fighting while they were interrogated and how do I find more?

Edit: Never mind I guess, got to close to the edge and ‘jumped’ to the lower level, an Adept was successfully interrogated