Actually, there are lots of cases where choiceadv-only monsters are included in mafia's location details, although as a special/boss encounter so that they don't skew the area's survivability info: the Mimic in the DoD, Ghastly Organist in the Ballroom, the wolf/snake knights in the Gallery, and half a dozen monsters in the Jungles of Ancient Loathing. In fact, both the Jilted Mistress and GMoB are already listed - but without the "the" in front of their names, so the don't match the monster data. Ooops! Will fix in my next commit, if nobody beats me to it...