For the assist thing,why not replace kills by points?Easy huh,but seriously if there is an assist system (which is good),there should be something like that: The guy who killed(but KILLED,not damaged)a zombie win 2 points,the assists(damaged but no kills)=1 point.For the zombies,hmm....Same thing maybe.Well,I dunno,that's just a sh*tty count system XD