Originally Posted by
Tex_Mex
It's actually even closer than that, since Fuma Shuriken is also slashing damage, so it is buffed by the slashing debuff as well. I'm not sure if these buffs are additive or multiplicative, so I will show both calculations below to get the actual potency
Additive: (10% slashing + 20% physical = 30% total) => 240 x 1.3 = 312 potency
Multiplicative: (1.1 slashing x 1.2 physical = 1.32) => 240 x 1.32 = 316.8 potency
That combination of buffs, combined with the GCD clipping from Raiton does absolutely result in Raiton being a loss in most DPS situations. But if this were changed so that Raiton was buffed by the Dripping Blades Trait, then:
Raiton: 360 x 1.2 = 432 potency
This change would easily make Raiton the superior choice, thus rewarding the more difficult mudra and making more sense.