On the end when you sell your wriggles, you don't have any lifesteal!
Put and in your build, your ultimate is on hit effect!

AD carries shouldn't need (much) defense at all. You rely on popping in at the right moment, and killing them before they can focus you - which I found worked well. And you should be using your ultimate when you get focused, not just for the lifesteal, as it breaks their focus for a precious few seconds.

My resistences are consistently above 100 lategame anyway, maybe you're not using the full runeset? It helps signifiantly. Either that or you're not building properly.

If you wanted a more bulky build, you should have found a more bulky build, rather than this one which I made clear was for an AD carry with little defense.

i tried out your build and i lacked the lategame defense. u can't build her like that cuz she not tryndamere, even if i pop the ulti, i still am below 2k hp and 100 resistances

Voting's finally allowed, so here's your upvote :P

Thanks for the feedback. Unlike some, I chose not to rush this out to take time to format it properly and explain all my choices.

I might give Trinity Force a shot on her, but I believe that Phantom Dancer is ideal. You don't hit the AS cap even with Burst of Speed (although you come pretty damn close) and the overall increase to your damage will be superior to what Trinity Force provides. I believe Trinity Force would be better if you're building her as more tanky DPS, which I might give a shot at some point.

While you WOULD hit the AS cap by using the active on Youmuu's Ghostblade along with Burst of Speed with this build, that's not the idea. Youmuu's Ghostblade's active is meant to be used while Burst of Speed is on cooldown to keep you in the fight, hitting hard.

WOW, a beautiful guide! Probably the best one out right now. If I'm totally honest this guide deserves to be at the top when voting is allowed. I hope you can make it through all the troll votes you'll recieve from other Fiora guide writers, because this guide is probably the best of them right now.

Critisizms: Only one, Fiora doesn't need Phantom Dancer AT ALL if you have Youmuu's Ghostblade and Black Cleaver. I discovered her true item potential with Trinity Force. I'm not saying you have to put it in, but I highly recommend you try it, it's amazing on her, and you won't break the speed cap while keeping your crit chance over 50%. You won't regret it!