Cant leave Reaving tempest elevator.

[Vixxynn]

I guess I am stuck.

I have Yrlieth with me, I have saved the Farseer, I have killed Marazhai (because why would I ever let a drukharii in to my gang?), I have talked to the haemonculus, I have looted everything.

I have heard some ideas that you are supposed to have either Yrlieth or Marazhai with you (poor dogmatic players I guess) and I have had Yrlieth with me through the whole spire.

Time to uninstall and forget about this game??

[Vixxynn]

OK for those who had the same problem as I: Apparently I HAD NOT looted everything. What you need is a Webway Resonance Device, something I completely missed in the dialogue.
You find it in the laboratory/torturechamber/haemunculi kindergarten where you found the farseer.

[His Divine Shadow]

Yep and hey good on you for re reading the dialogue and figuring it out