Hey, In this guide I'm going to tell you how to build Jinx. Masteries, Items and other ways of building her. If you have any comments, feel free to make them. I will be reading them all. I will try to update the guide as much as possible.

A big problem with Jinx here is that her mana will be gone in no-time If you start spamming your Q. This is also the reason why mana regeneration is viable on her, but I still think that the best way of building her is simply by flat armor seal/magic resist glyphs. You could take AD marks, but I Armor Pen. more. Same goes for the Quints

Standard 21/9/0 Build. A possible way is to make a 21/0/9 mastery page with mana regen and movement speed on utility.

Now the Items.You want to start with Dorans Blade. Do not start with Long Sword. Why not? Because it's a waste of gold. With this Build you are going to rush I.E. and a Doran's Blade gives you a great dueling potential.

R>Q>W>E

You want to upgrade your Q first and not your w. Your Q does damage based on your basic attack. You're going to rush I.E. so Q is much better for critting and pokes.

With spells just go barrier/cleanse (Depends on the situation) and Flash.