well i could suggest instead of assassins hunting each other down, the assassins have to kill the other side's commanders so they loose their side of the war. you would have to sneak in and maybe develop a strategy to getting around the assassins of the other team trying to achieve what your trying to achieve but on your team

assassins can kill assassins but they will just re-spawn after a short while

you should know how hard it is the get iconners and mappers these days. it was probably a bad idea of trying to create a game without getting anything before hand

well i don't know a thing about coding mapping or anything like that, all i do is create icons