[MA] Technique Mastery for DWA?

[Kromm]

"A skill's core uses aren't eligible" catches this one. The actual roll against Dual-Weapon Attack is for core use: standard attacks. You can have Technique Adaptation only for peripheral attacks. It would take a very lawyer-like reading to claim, "Attacking once with one hand is a core use, sure, but once you do it with both hands at once, that changes." That would be like saying it's okay to use Technique Adaptation to get +4 to Wrestling as long as you insist that it only covers two-handed grapples.