Why? Cause you're so sure Prof is lying?
Because we shouldn't let someone blast us for free, beyond the two town kills he needs to hit accurate shots for the mafia ones and that is not guranteed which means more townie deaths.
Then we have to consider mafia kills and abilities as well as potential vig shots.
Not to mention the possibility of him being a lying SK and by the time we discover him it'll be too late for us to really do anything which means gg.
I believe Prof is as tanky as he claims and if he also claims that he gets stronger then the omega is best used on him. Especially since that's a guranteed shot, it will be incredibly shitty if the omega gets wasted on a town slot.