[Suzerain of Sheol]

Well, the Emim would be hellish to fight in the sewers. Like, seriously, I will get downright mean if one of those things decides to try and kill you. They do NOT fight fairly at all. With even a few Dybbuk occupying the group, it would have almost an 100% chance of killing you all, unless you had an ED grenade handy to banish it. (or certain other items that could hurt it, you get the idea.) Thing is, it's an extremely powerful psychic that's had a very long time to practice its powers. If Rue were rested, alone, and undistracted she could probably put up a fight, but as it is... you'd likely wind up back-stabbed by one of the others, honestly. :p

But, no, the Emim will be phasing into the city where they can do the most damage. You could try to negotiate with one. No promises on how that would go. (Might be able to teach Rue or Fee a few things, if you got on its good side. :p)

And the Rephaim wouldn't likely fit down there, so it won't show up.

Expect just Dybbuk.

Seriously, though, I recommend we all find some kind of armory to raid ASAP. We're just not equipped to deal with most of this world's threats yet.