My group and I played through the first game in a campaign yesterday. It was a blast! We started in the library. The one lone Pink Horror that was acting as librarian wasn't too tough, and left us feeling pretty good about our chances.
Next up was the Whirligig passage. This one got crowded really fast, and we were worried that we would be overwhelmed. But after slogging it out, we managed just fine.
Then came the Abandoned Nest. We discovered it was home to an exotic enemy, and went with the Exalted Flamer. Fortunately the Knight Questor was able to put some damage on it before the Fireslayer Doomseeker finished it off.
The next room was Perilous Footing, which was appropriate enough because there was a trip of Screamers hovering around in it. The Knight made good use of his challenge ability to draw them in so they wouldn't get fly-by attacks on their own turn.
Finally, we arrived at the last room: Searing Beams. This one featured two turnable pillars that fire beams of searing light. The room was absolutely packed with cultists and horrors, but by now we had started to work out a routine. The Excelsior Warpriest used his blast of holy energy to pop 6 or 7 Brimstone Horrors at once.
We actually had to stop the game because we ran out of time, and have not yet finished the final encounter with the Gaunt Summoner. So I will let you know how it turns out!