Psychomancy just isn't fair. The only thing that resists it is specialized schooling (and usually not even then), There's no travel time, no casting time. You can read one's thoughts and instantly know every move they plan to make, you can use illusions to make them slip up and kill them with ease, you can paralyze them, control them, and at the same time a pyromancer can toss a few fireballs that will probably miss/get blocked anyway.