This would be a fun event. Evaders/runners would just make things a little more fun, like a predator hunting its prey. They would lack the skill to fight back against the more skilled players hunting them down, causing them to try to hide or do something clever like luring players chasing them to kill each other, leaving less opponents to deal with. There could also be traps, which could open up more room for strategies involving baiting opponents into the trap. If there were many ways to reach victory, like simply killing everyone or cleverly killing off your opponents using traps to your advantage and leading them to kill each other, then this idea is just about perfect. Perhaps there could be an arena for this, sort of like the spar arena. Or maybe the war room in the spar arena could be remodeled into this, but the arena for the event has to be ENORMOUS.