idk may it be technically possible or not, but maybe make the CrewPostor basis as a imp and check he's fake tasks list, and take all of them, and when CrewPostor stands in the specified area of task for a some seconds (min and max can be changed in the options, just like bite's options), the nearest target will be killed
#About CrewPostor
vast flame
raven bobcat
Better if it becomes a Neutral I think