BatteMage Vs other Mage Vs Bosses

None of Battle Mage's attacks have an element.

I'm pretty sure Dark Shock and Dark Genesis are considered Dark elemental (or were the last time I played my Battle Mage). It just so happens that about every enemy with a weakness to that element is either under level 70 or not in GMS at all. Most people don't even realize that there is a Dark element anymore.