Personally from my KSeal experience I like Jester(Clown)
I mean with the right combo you can kill a enemy b4 it even gets to you :D

if you dont know how to advance combo with clown . . .
then u fail clown school !!!!

description of advance combo :
simple ~ able to kill 2~4 monster in one set of combo

other class can do this too , but clown has a range advantage

Oops forgot how to add in the part about the range... :P