Any idea when you'll get book 6 stuff posted, Avari?
My party is in the Vekker's house in Book VI, which I'm mostly just treating as RP encounters because those haunts are all pretty weak. Sometimes I have no idea what the authors are thinking when they through a CR8 trap in for a level 15 party. My party has strong saves across the board, especially Will, so while this is pretty spooky stuff with ambience I can play up, they aren't really in any danger (worst case scenario: they have to cast a Resurrection).
Sadly, the latest book 5 stuff came juuuust too late for me to use them - not a huge problem, since Vraxeris turned out to be a huge problem for them (mostly because of the mirrors of opposition and some clever NPC spellcasting to protect the mirrors from being destroyed immediately) and the Halls of Wrath were rough until they managed to get communal resist energy up (an awful lot of fireballs came all at once). I was honestly surprised by how formidable the Karzoug statue was straight out of the book.