The five best AD Carries this patch are not the same as before, thanks to some nerfs and buffs that happened with the release of League of Legends Patch 11.7. For starters, Kai'Sa has received a nerf that increases the cooldown of her ultimate ability. Tristana's attack damage has also lowered, while champions like Varus and Ashe received buffs. Keeping in mind the changes, and how that may have affected the win-rate and efficiency of the champion, the best AD carries for Patch 11.7 are:
5 Best AD Carries in League of Legends Patch 11.7
Now, I know that a nerf just hit the Daughter of the Void, however, this affects her early game. Kai'Sa still has a very strong late-game, and she pretty much defies statistics. Normally, when strong champions have high pick-rates (from players that are just learning the champion) the win-rate should go down... but that is not the case with her, who has the highest pick-rate in the last week, high win-rate and is in the top ten highest ban ratios. She's a mobile AD carry, who can stack damage and can deal damage in an area.
Similar to Kai'Sa, despite the nerf, Tristana is doing well in terms of statistics. Rocket Jump provides a lot: a gank escape, an offensive ability, a slow, and an AOE damage dealer. Explosive Charge is an efficient way of poking at enemies (and even their allies if they are close) from a long distance, something that sets Tristana apart from the rest--her incredibly long range thanks to her passive.
Having both a melee weapon and a ranged weapon makes for an AD carry that has plenty of survivability. On top of that, Samira's ultimate ability has no cooldown. This gives her an advantage during midgame as she can use this AOE ability as long as she has enough mana, and low-health targets. Additionally, Blade Whirl provides a lot of protection from enemy missiles (on which many ADCs rely).
In terms of bot lane champions, Jinx boasts one of the highest pick-rates and win-rates. Her ultimate ability can take down any low-health target, regardless of where they are on the map, if the player knows how to aim the projectile. As if that weren't enough, kills reward Jinx with an increase in movement speed, making her a dangerous opponent at almost any phase in the game.
The guaranteed critical hit makes Jhin a strong pick, regardless of whether he has a build focused only on physical damage or around critical hit. The flexibility that players have when crafting a build for him, along with his overall kit (and stats) make for one of the best AD carries this season. The snare, and the traps, will come in handy when close-range champions try to kill the Virtuoso.
This list is a general one since the best AD carries in the lower ELO tiers are different than those in the professional scene. It's worth mentioning that this is not the absolute truth, and again this is based on how we have seen the champions perform in matches and statistics.