I'm carrying Demonslayer and seem to be a locked door away from Rentar-Ihrno (though I expect surprises), but I still have no idea how to get beyond the Spire Fortress to Bargha, Spire, and the Abyss, Levitt would be quite disgusted with me if he knew.
Have I missed a mission or story thread somewhere? I hope for some innuendo, but if I'm too dense for that, I might give in to full frontal revelation.