what is the best Assassination tech

[Zavage10]

Silent killing accompanied by Kamui.

By silent killing do you mean the mist

 

[Retsu]

ftg+Bodyflicker+kunai to throat

 

[ShishaMastah420]

C.O.A.T; Creation of Super Gigantic Black Hole...

 

[Yo pappy]

By silent killing do you mean the mist

My bad, I thought Silent Killing was always used in conjunction with the mist, but I guess that was just Zabuzas way of doing things. Silent Killing + Hidden Mist + Kamui

 

[ANBU Kakashi23]

muu's invisibility by far

 

[SilverSlick]

Tobi's warping tech+intangibility.

 

[AnimeFan002]

Silent Killing.