This is my build for fiora, I never fail with her, first day I played 7 ranked games with her solo queue and 7 time won.

Starting with cloth armor coz many top players are AD(attack damage) and 5 health potions. Then quickly grabbing wriggles lantern and berserker graves, still laning... then go for some dmg and more lifesteal for soloing the top with Bloodthirster, then comes late game, u are too squishy so grab frozen mallet and get health, then buy atma's impaler to get crit, armor and more dmg, then go for infinity edge big crits and dmg, then u can sell wriggle's lantern coz u have enough lifesteal from bloodthirster and buy sunfire cape, gives u armor and health(atmas ipaler, so giving u attack damage too) or get thornmail if enemy too strong!

*NOTICE* this build is my firt build so i dont know so many tricks here on site, i wish u luck and i hope u will own your enemy's ! It will be good, when u have some tanky jungler ! ENJOY ! :D