WOW Power Leveling: Thunder-shock isn't really worth using unless fighting against defense
Thunder shock Second metal damage skill move that lowers the metal defense of the target, the special effect helps WOW Power Leveling out other lightning skills so that they do even more damage.
The longer cast time however makes it not too perfect for PvP since BM/BAR could run you down, but if time allows, it helps out lightning strike nicely. Besides PvP, thunder-shock isn't really worth using unless fighting against defense enhanced monsters (most players avoid anyways).
Leveling Route: Keep at level 1, then max it out at levels 7x/8x when you have extra sp.
Strategies/Tips: To take advantage of the metal damage boost, when fighting wood monsters, lightning strike + thunder-shock can be a devastating combo. If time permits, thunder-shock before any lightning strike is good as it makes lightning strike more worthwhile.
If partying with an Cleric, thunder-shock + your lightning strike + their thunder wield can be pretty impressive on an unsuspecting BM/BAR.
Bow/Arbalest Mastery Passive skill that slowly increases your damage by adding equipment attack bonuses. It's common sense to level this as well. More damage = archer's other best friend.
