Whoever acts first survives. Whoever acts second, never acts. Welcome to the world of snipers, technological or psionic. It is still one shot, one kill. No warning, no fair play, just dead. Also, a guy who carries a sniper rifle as his primary weapon isn't the guy who kicks in the door, he is the guy in a perch waiting for his target or targets. So, I am not sure that your encounter range is correct unless your Psion's movement rate is 200 meters or more. The Psion is a firework. One and done. Plus, one person disappears in plain sight, the whole planet is going on a Psion hunt due to propaganda and paranoia. One guy gets assassinated with a rifle, people don't even blink an eye. There were snipers killing people in the US along the expressways. You know what people did? Nothing, they kept going to work on the same route they took every day before.