Just did, yes. I created a new character, set it to NPC, Challenge 1, CHA 16, did not set default ability (oversight on my part), imported "Ray of Enfeeblement", changed Default Ability to CHA, set Spellcasting Level to 2, changed save and attack in the spell to CHA, set a global DC bonus of 1 and a global attack bonus of 1 on spells tab. The NPC is a "Kaorti" from the "Fires of Hell" free PDF adventure. The author has chosen to follow Monster generation math only very loosely, hence all the adjustment with global bonuses needed.