Well met, all:
These aren't typos or mistakes in the adventure, but important points that I think I should clarify for you when you go into DMing the encounter:
1) Charl's "hidden" status:
At the same time, make careful use of this, because it has the potential to go much the other way and TPK your party. Charl should get off that wicked attack 2-3 times in the encounter, and that should be it. Also remember Charl only has 4 smoke pellets.
2) Flirt with Theryis and Toram:
3) Manikins and Mirrors:
4) Let the fight end with words: