Fujitora
Quick Charge + Unique Action Enhancement + Battle Charisma (Faster Kizuna gauge build up) + Stylish (Lengthen kizuna rush mode)
Never have to press a button other than the R buttons ever again.
Buggy with Unique Action Enhancement is pretty awesome too. I build the kizuna pretty fast with his R1. (Talking normal mode here, not Nightmarea)
For others, I tend to prefer using a combo enhancement for my favorite combo string (Whitebeard + SSSST wipes EVERYTHING. Whitebeard with R1 Enhancement or Quick charge is also good...)
For general attacking, Pirate Alliance I think was a good one and enhanced kizuna damage. I personally thing the skills that increase chance to stun are good too for KOing generals faster. Less chance for them to get super armor if they are seeing stars.