i have no clue about ninja.
all i can say is khorin is one of the best / more annoying players ( depending if you have it on your side or not lol ) i ve seen.
When i kill him it s like a big victory for me, but it doesnt happen too much lol.
When on my horse and i see him coming towards me, i have to recognize i generally change direction.
And one day i was in a "duel" with him, and it was not a duel, it was a rape....
So all i can say is NINJA yes, but with the spirit of the ninja described by Khorin.