Thank you in advance for taking the time to read this and give me your advice!
I have done some GMing of games for the past year or so, but they have always been games of 5 or so players. I am hosting a Halloween one night only game, and it got more popular than I anticipated. 11 PC's to be precise...
The books say that when determining difficulty, if there are more than 6 players, simply add 1 to the APL. But going from 6 to 11 players is a pretty massive difference, and I don't think simply adding 1 to the APL is going to be enough to make the fights challenging... On top of this, since it is a one night only session of 3 battles, everyone is power gaming HARD. People are ignoring the idea of Role Play entirely. They are all level 12, and have by the book amount of gold to spend (108,000).
So questions are...
What would you recommend I consider their APL (Average party Level) when determining what monsters to throw at them?
Do you have any particular advice for how to design such large scale fights?
Thanks again all!