With intel Kisame could solo because C4 small particles still have chakra so Daikodan or Samehada absorbs them. Without intel it could go either way but water duo is stronger.
Explosion would overwhelm Kisame. I understand that Samehada should be able to absorb their chakra, but he can't possibly hit them all. I would say that Deidara blitz with c4 and c3, but Kisame has high durability. C1 or C0 take the win.
Hebi Sasuke didnt have problem dodging explosion so kisame can do the same. C0 is restricted and C1 is fodder jutsu.
True.