who is the best late game assassin?

F-word Fizz

Fizz, Kassadin and kat are statistically the only assassins whose winrate don't go down late game, so I'd say them

EDIT: are we counting master yi? If so then he's the best late game assassin

Highest chance of killing the target:

Zed is not that good lategame because everyone has zhonya/qss making his ult useless. Yes he doesn't need ult to 100-0 someone lategame, but his combo is much slower than rengar/talon's.

Fizz needs his delayed ult (like zed) to kill, it's hard to land on the adc/apc during a teamfight and zhonya/qss will remove it. He can kill with EWQ combo but he has to be pretty close to do this way and it's easy to dodge and he will have no escape after.

Ironically, it's actually . Leblancs late game is actually really good if you manage to reach it, but it so rarely happens because farming with her is so much of a chore. 6 item Leblanc is easily the strongest assassin in the game.

you really don't want to get to late game as an assassin most player should have got armor or mr at this point and adc got tons of lifesteal really if you late game assassin you failed and are the cleanup in fights but if i need to i will say

kassa, followed by fizz. depending on the opposing team, kata and yi

Jax or master yi probably jax now since he can 1v1 anyone in this game no exceptions. and he can burst faster than mages now.

possibly assuming he's even 10ft off his skill floor.