I can confirm, at level 120, that you're dealing with Charred Ghouls who are an absolute bastard to deal with. Think something almost as tough as a armored Super Mutant, armor-wise, but with that infernal, jet-jittery skitter-run that Ferals possess.
So glad I'm specced for epic V.A.T.S. fun-time otherwise that place would have been a nightmare. The visions you get as you go through are also a [censored] trip.
I am really regretting giving the blade to Strong, however. I gave the blade of lovecraftian evil to the dimmest, most brutal Companion in my arsenal. Surely this was the dumbest idea of my Fallout career.