Mr. please... saying they are fast with hand seals isin't doing to work mifine will chop your fingers all together... if he can stop hanzo from using ninjutsu then kakashi better run for his life of he doesn't use genjutsu or get some steel in his A**Kakashi would win.
Kakashi could still use ninjutsu against Mifune. Not being able to use ninjutsu against Mifune is just trash I'm sure Itachi could weave hand signs and Mifune wouldn't be able to stop shit. Kakashi also has fast hand seal making speed.
Kakashi does not need handseals to perform Raikiri or rasengan, and Raikiri would most likely be the only technique Kakashi would need against a close range swordsman such A's Mifune.
Like I said before Raikiri and Rasengan requires no hand seals to make so Mifune is done for with his old dusty ass.Mr. please... saying they are fast with hand seals isin't doing to work mifine will chop your fingers all together... if he can stop hanzo from using ninjutsu then kakashi better run for his life of he doesn't use genjutsu or get some steel in his A**