Two ways to do this, the first is a lot less resource intensive, but the second is more powerful:
#1:
Breath Weapon [-2] possibly with a Feeding Dependency attached. Plus maybe Inhuman Speed, definitely True Strike, and a lot of mundane Weapons skill and Stunts. Total: -1 to -6 or 7 Refresh, one skill at Superb.
#2:
A more focused, high powered and mystical build, at Submerged.
Skills:
Superb: Conviction, Weapons,
Great: Discipline,
Stunts:
Riposte (Weapons)
Footwork (as the Fists Stunt, but for Weapons)
Powers:
Evocation [-3] (Air, Earth, Spirit); Power (Spirit +1), Control (Spirit +2)
Refinement [-1]
True Strike [-1]
Feeding Dependency (Chi) [+1] effecting;
Inhuman Speed [-2]
The second requires a lot more explanation, and is for a fairly high-powered game, even for Submerged, but could definitely be fun.