FLYFF difference in a BJ and Ranger?

I definitely know im going to be using a bow. But idk to be BJ or Ranger o_O i want to be aoe but my build is currently pure dex. (im lvl 51) should i be aoe with a tank? But then again what cl should I be? Please help. Any information you can give will be greatly appreciated. (also what build? D: please help)