I have a TON of loose ends and I'm trying to tie a few up.
One major loose end is that Nualia escaped Thistletop. I'd like to put her in Magnimar as my players are just finishing up Misgivings and will head there shortly.
Any input on the best way to include her in the end of Skinsaw Murders?
Include the module (which you can download from Paizo's website) "Dawn of the Scarlet Sun" and have her be the cleric who is doing the murders... and not realizing the succubus plans on sacrificing her. Obviously she wouldn't be a Sarenrae worshiper but that's a minor detail. :)
She went there to meet with Xanesha (who mentored her originally and gave het the sihedron amulet.) There are a few things you could have her do at this point; she could attack them directly, maybe put her with the faceless stalkers at Alderns house.
You could stick her in the mill or clocktower fights, or if you wanted to expand a bit more on the magnamar subplot, you could have her working against them socially, trying to undermine their position with the magnamarian authorities; that one sounds a little subtle for her, but Xanesha could have put her up to it.