☆All Theorycraft, No Practice: Quinn ADC☆

So first off, Quinn has a 525 attack range which is on the shorter side for bot lane, but her dueling power down there is actually solid.

Let's start with the pros: First, you can use the vision from W to briefly check unwarded brushes you can't facecheck, and Q can blind the enemy ADC for 1.25 seconds--what this means is if you don't give them distance, they literally can't auto you, which works out pretty nicely. Also, since E lets you chain CC and apply your passive mark, it's pretty easy to proc the bonus move/attack speed from W's passive (attacking a marked target). After level 6, since you can just base and ride Valor back, your lane recall timers are way faster too. If the enemy overstays without recalling, you can just pop ult -> mark auto -> E -> mark auto -> Q -> mark auto and that combo actually has pretty decent burst damage.

For runes, Conqueror still seems like the best choice so far, but Lethal Tempo and Electrocute also seem decent.

As for the downsides: first off, her waveclear is pretty slow. Her only AoE is Valor form auto and Q, so compared to champs like Jinx or Sivir, her push is slow. Next is range--in top lane Quinn's range is on the long side, but as an ADC it's short. Her 525 range is the same as Kai'Sa, but since ADC Quinn has Stormrazor + W movespeed, I think kiting is actually a bit easier than on Kai'Sa.

Ban recommendations: I've played about 5 games, and the champs I definitely found hard were Nautilus and Thresh (weak against them). I did well against champs like Rakan and Blitz.

Item builds: There are 2 options.

1. Stormrazor -> Essence Reaver -> Infinity Edge. The damage is there, but hitting the 3-item spike feels slow and you're lacking attack speed.
2. Yun Tal Wildarrows -> Navori Flickerblades -> Infinity Edge. Since you're going Yun Tal and Navori, you have plenty of attack speed, and with E and Q coming back up way faster, spacing is really easy.

Supports that work well: at my elo, Braum, Neeko, Karma, or a damage support.

TL;DR: Can beat most ADCs in a 1v1, and teamfights are not bad either.

For reference, I'm Silver 4 so take this with a grain of salt.