So I am running CoT for a group of Vigilantes, but the play seems out of place. After spending an entire book hiding their identity and wearing disguises, now they need to gain fame as actors?
Why would a group of crime fighters be allowed to star in a play? Imagine batman going as part of a play, everyone would be suspicious. On the other hand, if bruce wayne showed off fighting skills you would also have a problem...
I especially run into the problem because several of the PC have noblemen as their social identity, and should not have a problem getting to the mayor.
The Sixfold Trial is a bit of a problem child in that regard, as it assumes that the PCs aren't masking their identity, despite the fact that in Bastards of Erebus it was firmly established that they are supposed to.
In a party of vigilante's, my suggestion would be to run it for their social personas to get them into the party with props and costumes (aka combat gear) they would ordinarily be prohibited from bringing into Aberian's manor. That said, while this better suits the story for a group of vigilantes it requires two adjustments:
1) Take all the Fame points they would gain from the play, and attach them to the end of the module and recovering the Chelish Crux from the Asmodean Knot. I recommend ignoring the "lose fame" option, and being generous with extra Fame if they perform really well - there isn't really enough Fame points in the first five books anyway.
2) Vigilantes can't use half their class abilities while in their social persona, so one of two things need to happen for the play itself: Either tone back the encounters so it isn't a TPK, OR permit them to use vigilante talents that suit the character they are playing, and let it be passed off as magic items, props and special effects later.