Alright this is my first build and guide for anything. To start off, I'm not a pro at this game and my playstyle is more on the trollish side, such as something like Nami mid. If you want to go past this guide thinking "This isn't viable" "She doesn't scale well" etc. I thought the same thing until I tried it and it worked.
I don't know how to put in all the codes and what not so I apologize ahead of time when this is going to look really bad. This guide isn't for the noobs looking to copy a build, don't blame me if you don't know how to play and end up feeding, this guide is for those who actually know what they are doing.

Pros

• High sustain
• 2 hard CC
• Great initiator/chaser with E, ult, and passive

Cons

• No blinks/escapes besides passive
• Item champ
• CC is easy to dodge

Flash: This is a necessary for when you get ganked seeing as how you don't have any escapes.
Ignite: You have no real killing power and people are going to underestimate you and want to trade, teach them a lesson by burning them a bit and washing it away.
Barrier: This can be used if you're going up against someone like Ziggs or Zed.

Primarily you're going to be maxing W because that's going to be your main damage/sustain. Then you can either do Q or E depending on if you want more damage or slows for ganks from your jungler. As always, you put a point in your ult whenever you can.

Your Q is how you're going to be doing most of your damage and you're going to do this by hitting them with your Q, use your E on yourself as the stun ends, and whether they decide to trade with you or not W them. If they do decide to trade wait until you take some damage before you W so you don't waste mana on a healess heal.

I'm not going to explain laning situations/ teamfights because I would make it more confusing than it would have to be. If you have any questions or anything, just comment below.