10-Excellent map, played it many times. But I think somekind of scoreboard at the end of rounds would be awesome. Like one which would show kills/deaths, kills with headsplitter and shuriken. How long have been your average living time, and who has killed you most and who you have killed most. It would be funny to read those scores. Do it Ninja way!
EDIT: And btw, I think there is maybe too long cooldown on headsplitter, its anoying when you have just splitted someones head, and another one comes. But this is only my opinion, do as you want if this unbalances the map.