This ninja will never come to reality as you suggest it, the only way it could be made is fixing the scaling.
You're saying each unmissable basic attack of Sasuke would increase his atk/nin by 5% with each target hit. That's a minimum of 20% each turn, it'd easily could be the triple of that. On top of that in rage mode you add an stackable damage scaling of 20% with guaranteed crit.

There's no ninja in the game that nearly has that damage scaling. This ninja you're suggesting would be able to explode any ninja currently implemented in just a couple rounds. There's some people mad about Six Path Naruto being godlike with so much distance between him and Rinnegan Sasuke, but the way of solving that issue is not creating a way more unbalanced ninja.

Please be realistic when suggesting new ninjas.