Uchiha clan's strongest Jutsu

[Rikudou Tobi]

Its not an Uchiha jutsu when Kaguya is the only other one that used it. Uchihas did not create the tech nor can thry use the damn thing without Rinnegan of bijuu chakra. And only one of them unlocked Rinnegan.

Its Kaguya's Jutsu because she invented it.

Kaguya doesn't have a rinnegan for starters so you don't need one to use and Uchiha jutsu derived from the founders of the clan. So yes it's kaguya's jutsu but it's also an Uchiha jutsu considering that Uchihas are capable of preforming this jutsu.

You are posting all Black Zetsus manipulation info

Black zetsu can only manipulate jutsus that the Uchiha can use so nothing here I said was wrong.

 

[Ansatsuken]

Hagoromo said Kaguya third eye is Sharingan or having Sharingan power. Guess what Uchiha have Sharingan and Uchiha Itachi have small scale Tsukuyomi.