Hey Pateuvasilliu,No. Itachi isn't beating Kakashi, simply for the fact that in base Kakashi owns him and Kamui is better than Itachi's MS techs. Kakashi's intelligence is also superior to Itachi's, having outsmarted him before.
No matter what state of mind or knowledge, Kakashi's Kamui -will always- outclass Itachi's MS tech.
As for Tobirama, bar Susanoo Itachi can't fight him in close quarters and if he uses Susanoo he will simply get outlasted or Tobirama clone rushes him, ports Susanoo and kills him.
Both Kakashi and Tobirama can beat Itachi.
He can simply avoid it.
Since it has a buildup, Bee knows when to close his eyes.
Furthermore, the V1 or V2 cloak should block Amaterasu when Bee sheds it. It's been shown before that chakra repels Fire techniques.
( in part 1 Naruto blocked Sasuke's Katon with a Rasengan. Since V1/V2 works as a shroud of chakra over the Jin's skin, if shed the fire will only burn the chakra, not the user underneath ).
Why are you trying to take on people that have clear superior debating skills and manga knowledge than you?