So I had a pretty fun build for Shigure. It's White Blood and it basically functions as a heavy duty Trublade.
Kamui (+Speed, -Whatever/Wyvern Rider)!Shigure (Buddied with Hisame)
White Blood
Swordfaire
Deadly Breath
Astra
Hoshido
Strength Seal
Swallow Strike
You get 6 skills this time, right? Basically Shigure will have a +7 modifier in speed and most likely a -1 in Strength, but Swordfaire should make up fr it. He between Swallow Strike and what I hope is a much higher than average speed stat, he should double most things.