I'm going to be very brief with this guide. THIS IS NOT AN IN-DEPTH GUIDE. Fiora is tough, has decent sustain and snowballing potential - But don't get too cocky. The opposite can also happen.

Fiora's game style is strict - There aren't too different types of playing her, and the only build that works with me is anything starting of with DAMAGE - That is her main thing, Fiora isn't a carry, isn't tanker or a guaranteed assassin, she is a damage dealer. A balanced strong champion.

Straight forward - Don't charge in like an idiot but don't be a coward. Most of my kills in lane are by baiting and a well timed W, even more easy with the Ult on. So yeah, i play defensively, and just so it's clear, this guide is made by my trials and errors, you don't have to play like i do, but if you really just don't buy it, suit yourself.

YOU START WITH Bloodthirster, it's just that simple, it's your bread and butter - If you can't deal damage then you can't do anything else, that is why Fiora mid is a thing, she is basically an AD Mage AA-Based --> She can also split-push, but no matter how fast you strike, you can't push properly unless you have Ravenous Hydra, that is why you need it.
ALL the other items are 100% situational. You'll have to use your experience and knowledge of the other champions to succeed with a decent build.

To split-push you can take Infinity Edge + Phantom Dancer

To take down their fed mid laner you can take Hexdrinker or Banshee's Veil

Against their fed adc you can take Ninja Tabi or Sunfire Aegis or even Thornmail

And if you are wondering about why i take Flash and Teleport - It's because i have escape, engage and movement capacity - Allows me to get back in lane if i mess up and jump to a tower that i can take down.

Before the actual team work, you need DISCIPLINE to be able to lane well, if you think you'll own your opponent just because you had a 36/1/?? score in your last match then you're gonna have a bad time. Don't get over your head, don't jump in a fight without being certain you'll win, of course, you don't need to back off if it doesn't reach 100% - Gambling is part of the game as well, you'll either be right and win or be wrong and learn - From my POV it's a win-win situation.

Now... Team work... Much more with the players then with the characters - If you're with a group of friends, on Skype with headphones and mics, then you barely need any hint - However, if you are in solo-queue you'll have to talk to your teammates - As long as you don't lose - You'll either win or draw against your lane match - So play safe. Some junglers don't gank your lane if you're losing too badly. And, please, keep warding your lane.

I'm not going to tell you how to farm, because it's pretty simple - If you have a hard time farming, then train in an empty room, timing, power... Just get used to it.

But when it comes to early game farming... Farm as if your enemy wasn't there, as if his presence isn't of any danger(of course, don't get TOO close), keep farming calmly, ready to press W if he engages, and if he decides to do so, then trade a few hits, and back off - Your passive, Duelist, will keep healing you + the life steal from Doran's Blade, with Riposte to help your enemy keep in his place since most of champion's damage are based on 2 things after spawn - The first ability the pick and the auto attack - Sometimes Riposte can counter both.

Farm patiently without risking too much - And wait for a gank attempt, which you can Riposte, Lunge in or out with Burst of Speed to give you some trade advantage and mov. speed and, finally, Blade Waltz to completely destroy your enemy's hopes of an easy kill.

Yes this has been a short experience - But i hope it can be useful for those starting with Fiora. And lastly --> Don't forget you have no CC, but the red buff might be useful, oh and in case you match up against a Jax, you're not necessarily going to lose the match, but his E can counter your Blade Waltz so don't use it BEFORE you get stunned. And you need discipline to not challenge Jax to a 1x1 - It's just not a good idea - DISCIPLINE, remember?

Don't forget to leave a comment about the guide, rate if you'd like to and, finnaly:

Good Luck and Good Game