ADC or bottom lane is a very critical lane League of Legends. ADC champions are typically a bit short on health. However, the damage they can do from a distance is massive. A good ADC can not only clear minion waves quickly, but deal damage over a wide area. With that in mind, here's your League of Legends Patch 11.3 ADC tier list.
Kai'sa, Samira, Miss Fortune, and Jhin are some of the most potent ADC's currently. All of these champions see a lot of attention in professional play and for good reason. The amount of damage these champions can do is absurd. On top of that, they can burn through minion waves extremely quickly. If any of these champions get a lead in the early game, it's not difficult to see them snowball their lane and rack up kills on the scoreboard.
Aphelios, Senna, Ashe, Ezreal, and Caitlyn also see a lot of attention in professional play. Aphelios is one of the most complicated champions in the game. His swapping of weapons makes him difficult to manage. However, once a player gets the hang of it, Aphelios has a very high ceiling. Senna doesn't have a quick wave clear. However, she does provide plenty of damage and shielding in fights. Ezreal can clear waves slightly faster. However, he has to burn his Trueshot Barrage (R) in order to keep pace with some of the higher tiered champions. Caitlyn can auto-attack and use Piltover Peacemaker (Q) from a distance. However, Caitlyn doesn't have a lot of defensive options once she's caught. Ashe can clear waves quickly, but outside of her Enchanted Crystal Arrow (R), doesn't have a good way of engaging fights.
Kalista, Xayah, Vayne, and Tristana fall to this tier for a few reasons. These four champions can all clear waves fairly quickly and deal plenty of damage. However, everyone but Tristana in this tier gets outranged by their high tier counterparts. Tristana's Rocket Jump (W) and Buster Shot (R) also work backward since Rocket Jump is typically used to jump into an enemy, while Buster Shot pushes them away.
Lucian, Draven, Varus, and Twitch find themselves on the low end of the tier list this patch. Lucian can flex to Mid Lane if need be. However, as an ADC, Lucian's strongest attacks have less range. This puts a lot of emphasis on Lucian's dash and his ability to weave around a crowded lane. Draven is predictable since smart players will recognize that Draven goes to where his axes will fall. Varus doesn't have an easy way to engage fights, and is practically dependent on his team to do so. Twitch has an easier time engaging enemies thanks to his Ambush (Q) ability. However, if Twitch's initial strike doesn't work, he can be easily caught out.