kisame has been partnered with itachi+he has lots of more fighting exp so i think kisame has some way to counter hes eye techniques. + when he goes on rampage hes god damn crazy beast.
Sasuke. Kisame admitted his inferiority to a sick MS Itachi. Sasuke is healthy and has ems. Kisame's strong but I don't believe he's on Sasuke's level.
I dont think samehada could soak up ameterasu and kisame is not fast enough to dodge one of the ameterasu crossbow shots so kisame dies painfully in this one im afraid
He isn't fast enough to dodge a sussano arrow, and 1 of those will leave a gigantic hole in his body, heart and everything missing, + its amaterasu covered, so yea..