It depends, actually. The original reason that I decided that Maeve's Shadow Weave / Shniomh Scath would use Dust Affinity instead of Weapon Skill is because I was told that physical and Dust damage are different damage types.
But as the Dust that makes up Maeve's clothing, for all intents and purposes, does physical damage anyway (given that said Dust isn't actually classified under the Dust system you wrote up), it makes more sense for her to just have Weapon Skill and use her Semblance to make up for the effects of Dust she can't use.
That assumes, of course, that I'm correct. I haven't made a final decision yet.
Okay, how about this. elf shut up
Onslaught of Gales: Allows Lexus to strike a certain amount of times, base thrice, at half a normally calculated weapon attack's damage each.
Astra~