whats the intel, location, and distance
i think its a draw or team mizukage wins because the 2nd mizukage > the raikage mid did diff and itachi> kakashi high diff. kakashi already knows about tsukuyomi so he can warn the mizukage not to look into itachi's eyes then the mizukage simply does his summong jutsu, of course the raikage wont just be sitting there watching him he'll definitely try to take out the mizukage or kakashi which would be a bad because if he gets close to kakashi he can use kamui due to the fact that his sharingan can probably keep up with the raikage's movements and trying to fight the mizukage would be futile because his lightning wouldn't hurt the mizukage's body because of his oil form of hydrification jutsu.
now in this battle there are a few problems, itachi has tsukuyomi and if kakashi tries to fight without looking in the eyes of someone like itachi then he is bound do get hit by amatersu or matagama. now assuming the mizukage has aready performed his summoning justu because kakashi was stalling itachi (he might die in the process) then he can put them both under clam genjutsu. but if that doesn't work, then while kakashi is fightng itachi the mizukage could just use joki boy
so i think team mizuakage wins
A. because A cant hurt him and he has his clam summons which can make a genjutsu that itachi and the raikage cannot break
B. becasue kakashi can distract itachi by constanly moving and watching his legs not his eyes, combined with kakashi's sharp reflexes and kamui it should be possible
C. amaterasu wont be used on the mizukage because he'll be fighting A so using amaterasu would be a risky as it could hurt A and itachi will be occupied by kakashi
D. neither the itachi nor A can counter joki boy or the clam genjutsu but especially joki boy
E. if there is no intel whatsoever (even their names and titles etc) the team itachi mid diff because of tsukuyomi otherwise team mizukage wins
team mizukage mid-high diff (with intel)
team itachi mid diff (no intel)
so it really depends on the intel. the mizukage and itachi both have jutsu that can end the battle quickly, also even if the roles were reversed and itachi had to fight the mizukage and kakashi had to fight A like i said with intel the mizukage can beat itachi and kakshi can possibly distract or take out the raikage but without intel even if itachi fights the mizukage itachi would still win win. actually without intel itachi solos because of tsukuyomi and with intel the mizukage with high diff could potentially solo because in this fight i find the raikage kind of useless he aginst the mizukage so it would be like the mizukage vs itachi featuring the raikage.
I don't even think A can beat kakashi (if kakashi's sharingan can keep up with his full speed). because he can just use kamui if the raikage goes for a hit and warp his entire upper body or just his head and then no more raikage but of course thats just a theory