From the introduction: Lost Palace of the Elementals is intended for four characters with an average party level (APL) of 8. Characters who complete this adventure should earn enough experience to reach halfway to 10th-level. A cursed lamp is drawn back to its efreeti master and both must be destroyed. This campaign takes place in Arden, although it can be set in your own world. Any party composition should be able to finish the adventure with intelligent play.