Sin Bow Build - Request

[kok2009]

I haven't touch Martial Heroes in a very long time, ever since Karma Server was shut-down. 
What is some of you guys best assassin bow build? What skills should I learn and what skill I shouldn't learn? 

I recalled there were some hybrid Claw-Bow build back in the days but I can't recall the skills name. 
Any suggestion would be greatly appreciated. Thank you!