Your "If Behind" build is the only one I would feel comfortable using. It makes you more tanky, provides CC whilst still packing a punch.

A chapter on situational items would be nice like on what situations you would switch Black Cleaver with Last Whisper.

Other than that a nice build. +1

I am sorry to say this but you lack a lot of knowledge.
First of all, you have a huge mix of runes, try either flat AD or AD marks with 1 AD quint and the other two should be lifesteal.
Second of all, you build little to no defense. It is indeed true you can close a gap with Lunge but however a Guardian Angel on an ADC would screw you so hard. It won't screw an assassin as they can escape nor would it screw someone like Aatrox or top Lee Sin because these guys build offense but they have a lot of defense too so they can survive couple to multiple blows. Your little defense only opens a way to get wrecked sometimes before you take a Guardian Angel down or in cases the enemy knows you shouldn't get close to their ADC, you would be 0.
Third of all, again about the build, try Ravenous Hydra, Black Cleaver, Last Whisper and then FULL TANK items(just sayin). As for boots, don't take AS boots, try either Ninja Tabi or Mercury's Treads.
Forth of all, try maxing Riposte. "HAHAHAHAH YOU ARE DUMB AND GAY". Well not really, but look at the AD the passive provides you. I personally would sure as hell like that as early as possible.
Besides your guide is incomplete... You got my -1 so far.

Thanks for the tips, didnt realize i made those mistakes. I also added in the rune descriptions.

You said "Crown Control". It's Crowd Control. Also, under the Masteries section, you said you would recommend those runes. They aren't runes, they're masteries. In the runes section, you should elaborate as to why you take those runes over other runes, etc. Also, Fiora is kinda useless in competetive play because she has 0 CC, she's only a litte bit useful if the rest of the team has CC.

Well, the guide is not organised. Try using Apart from that stuff. Why would you take Juggernaut and not taking Frenzy ? Block , Unyielding ? Try something else