Demons with dreamstalker passive(attacks do not wake up sleeping enemies and +%50 dmg vs sleeping enemies) ignore sleeping enemies and attack awake enemies first.I think all demons with dreamstalker should change their behavior and treat sleeping enemies as if they were stunned or shocked they should even prioritize hitting sleeping enemies to get bonus damage.
Lilim has both dreamstalker and blue whisper(puts enemies to sleep) and she can't utilize her passive.