Lmao no Konan isn't getting past Domu, and her attacks are easily overpowered and battered with the elementals. He has widespread fire, water, and wind that shits on Konan's paper, and can even be combined.
Kakuzu is like the worst possible opponent for Konan. She gets low diffed.
Deidara's a bit trickier, but Raiton neutralizes the bombs, the Wind mask blows away and disperses any small bombs, and domu no sells C1 C2, and probably takes minimal damage to C3. So basically Deidara can't even really hurt Kakuzu outside of C4.
His masks can fly, Kakuzu switches to long range with his treads and along with a couple other masks shoots Deidara out of the sky.
He definitely has an answer to everything Deidara has to offer. Especially if Kakuzu figures out his raiton weakness, it's a wrap.