Hey again everybody, sorry for not posting in a while. I should be back now.
Anyways, talking about Jinx now. She quickly became an S+ tier ADC after those range buffs, and shes completely blindpickable and easy to carry games with! You should dfeinitely give her a try and see how you do, it will be a great addition to your champion pool.

At the moment of typing this, Jinx is an S+ tier ADC who is blindpickable even if you have some tough laning phases versus aggressive supports. Jinx is a hypercarry, so if you really want the best scenario for her, it would be with a Lulu support and double ranged botlane (ADC + Karma, Lux, enchanters, that stuff)

Abuse your range advantage early game and your rockets to shove in the lane and get the level 2 prio (Jinx rockets are incredibly broken early game because you are pretty much guaranteed to get level 2 first). Remember to specially abuse melee supports level 1. At level 5, your rank 3 Q will outrange about everything, so play around that. Let your support know that you mostly want to play to scale. 2 items is when you shine. That being said, remember to trap the enemy if your support CC's them to get a flash, or maybe even a kill.

Woah woah woah, 2 items jinx? they better FF fast (or not). If you played laning phase correctly and got your items, you should be able to be pretty powerful at this point. If not, farm until you have your RFC/PD/Runaans, and then group up to fight. Let your team know that you need your items before starting to teamfight, and specially, that you need some peel.

You're a hypercarry, and it's late game. Play safe, trap defensively, and try not to get caught, and you should be able to carry by just right clicking.