What is the best assassin right now?

I like khazix rengar or zed.

On rift, I really like Zed. If ever there was an assassin that could more easily confirm a kill, I've yet to see him.

its a tank meta so none

Same as always. Leblanc fizz and zed

karma

Tanks are the best assassins right now.

Fizz, Kha Zix, Zed and a good Leblanc.

Fizz and Kha would be my vote. Fizz isn't too difficult to assassinate with. Kha requires more skill, but can do much better.