Extra Damage

You are familiar with how to do as much damage as possible with as much force
as possible. It has nothing to do with actual aiming, rather the knowledge of
how to gain maximum momentum of your weapon.

The classes that get the skill extra damage are:

warrior    : Level  65 (excellent)
monk       : Level  70 (excellent)
darknight  : Level  66 (excellent)
assassin   : Level  60 (excellent)
ranger     : Level  66 (excellent)
paladin    : Level  66 (excellent)
pirate     : Level  68 (excellent)
swordsman  : Level  61 (excellent)
rogue      : Level  55 (excellent)