[Snake]

This skill alone doesn't have any special interactions with Nachbeben.
This skill doesn't ignore Evasion. This skill doesn't ignore Wraithguard. This skill doesn't ignore Guard. (all should count as 'methods of protection'.)
This skill doesn't give any extra Schwarz Sturm points, and 'needs' it stacked to actually do more than 16 damage.
This skill's damage, alone, is tops 16 Physical Damage.

Why does it have such gigantic costs, when it does nothing special but a few jabs that ignore DEF, but in the end is just Matador food or Green Tunic FP leeching straw?

Now look at these FP costs from Asura Fist:


Damage is Weapon and Elemental ATK dependant, not a flat.
It gives 2 Schwarz Sturm points per use, can be double tapped for a free 4 Schwarz Sturm stacks if the enemy doesn't resist Dark.
Costs are minimal.
Ranged blast.
Magic damage.
Activates Nachbeben.
Damage increases a LOT the more stacks of Shwarz Sturm it has, which is easy to obtain due to the 'bonus' this has.
???

Can we have Regenshauer's base cost reduced by 10, and Asura Fist's base cost increased by 10? FP costs are also a method of ensuring balance, remember!