Never FF before 30 if you have these champions on your team

Jax

Can turn a team fight and eventually a game around, doesn't really scale just good at all points of the game...

Teemo

He scales way to well and can turn games around with this splitpush and objective taking capabilities...

Urgot

At full build can dish out just as much damage as half of the ADC class ( like Lucian ) but is tanky AF and has insane sustain ratios

Galio

Patch Notes 8.24

Twitch

Great ELO booster when duo'ing with an ardent support who focuses you in team fights

Kha'Zix

Damage Scaler, forces teams to group, lengthy stealth, annoying as f%%%%k

Viegar

Infinite scaler who is one of those champions who loses can lose lane but carry game

Kai'sa

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Kayn

Once he gets that Red Form and isn't 0 / 8/ 2 you know the game has its tides shifting

Yi

Do you really need an explanation QUADRAKILL %%% CHAMP WT%%%%%!!!!

Diana

Alot of damage, well everyone has a lot of damage, but it takes other champions 2 autos to kill you while Diana can do it with one

Honorable Mentions: Vi Splitpusher Ahri Solo Carry