Most op jutsu ever?

[BloodSeed]

finger genjutsu gg, amaterasu gg, tsukiyumi gg, sword of tatsuka gg

 

[iNotorious]

Harem no jutsu is OP.
Talk no jutsu is there as well.
Truth seeking balls
PS
Kamui

 

[Shadow Phantasm]

TNJ or TBB FRS.

 

[Hyphen]

Yagura's water mirror technique.

 

[Xāvî1]

Chibaku Tensei!
Kuchiyose Gedo Mazo.
Bijuu Dama Rasenshuriken!

 

[Sage konohamaru]

Naruto's TBBFRS

 

[AGoodBoy]

until kishi shows it's weakness, the most OP jutsu is kaguya's dimension hoping. It's sort of a hybrid of FTG and Kamui so combines some of the abilities of the two making it pretty OP.