Only Riposte and Lunge need tweaking on Fiora.

Right now Fiora is downright oppressive to a huge portion of the cast. Its not because of the basis of her kit. Its two abilities that make her entirely overbearing in lane. Four aspects of them in total.

Riposte by concept is an interesting and great ability...but using it as an engage is not by concept what a parry should be able to do. Most fioras lunge to a minion->parry as poke and if it hits, go in for your vital with that lunge reset, since for some ungodly reason minions reset lunge, then spam vitals on you getting lunge resets on the way. You basically can't travel past the first 1/3 of your lane or she will kill you unless she's terrible as far too many champions.

First off, if a champion doesn't damage her (or use damageless CC like Cocoon), Riposte should not have any effect at all. To anyone or anything. This is better design and more thematic.

Second, the MS slow needs to scale with level. It makes hitting her vitals far too trivial, and it being a level 1 skill until after 13 and making her as oppressive as she is...it just needs to scale with level. Hell, 10/20/30/40/50 would be what I'd consider. Vitals should not be as trivial to repeatedly proc as they are with so little investment from this ability being used offensively.

Third, the AS slow needs to go entirely. There's no reason why its there (especially at 50 fucking percent). Fiora is not supposed to be an in-your-face bruiser. She's supposed to be master duelist. Someone who strikes her opponents vitals repeatedly to gain advantages, backs off, bides her time, and goes in again. However, extended fights, just bashing on someone is what this skill allows you to do to win. Its not thematic, and its not balanced.

Fourth, Lunge needs to not have reduced cooldown if it hits a minion, or at the very least, if it does not kill a minion.

All of these factors currently make her trivial to play in lane. Considering the rewards she gets for proccing her vitals, she should not be able to repeatedly hit them and chase while hitting them off of stuff that the majority of champions cannot work around. Especially with how spammy and low mana all of her spells are.

Right now she is preventing a huge number of champions from being played, basically. You pick them, you WILL feed Fiora, or you will not have any farm and get repeatedly dove with their jungler. That is not right, and these changes will remove the abuse of her laning without preventing her from hitting her stride, embodying her theme, or being a successful champion in general.