The guidelines for building encounters in Saga Edition use an average of the total CLs of the enemies and hazards and divides it by 3. A result that is within three levels of the average level of a party of four player-characters is more or less a fitting encounter. I've read this both in the books and in the Encounter Design 101 web supplement. The trouble is, my game has five player-characters. How would I adjust the formula to work with this additional player?
Page 247 of the SW Saga Edition Revised Core Rulebook has this at the end of the paragraph on Combining Different CLs:
Note that these calculations are based on the assumption that there are four heroes at the party. For each additional hero, subtract 1 from the result. For each missing hero, add 1 to the result. [Result here refers to SUM(CLs)/3]