This build is surprisingly good. I've been trying to find an LB adc build that works, and here is a good one!

https://www.youtube.com/watch?v=xRd61cCSfeU

I can admit that I never failed a lane as ADC leblank

:D thx, I found it to be 'fun' you can toggle Muramana for Q/E or Mimiced Q/E + AutoAttacks as they all are single target (great burst around 100dmg) -> each will proc spellblade for extra 140 dmg on next AA + SotEL's True dmg on the spells and AA..

Kind of don't know what to say about the build, You get a bit of everything usefull LeBlanc needs (besides of massive AP power xD).
Around 20%cdr, Movespeed, Health/Mana Reg, Mana enMass, Waveclear, Armor, Armor Pen, Another Slow and still you hurt like a Truck.

Other things that could be Useful are TriForce, Maybe Rageblade, Lich Bane, even Nashors/Runaan/Wits end or straight Inf Edge could be considered as they aswell have some nice benefits.

But Yeah, I guess it's troll untill a streamer picks it up and we see LB in season 4 played as ADC bot-lane with Leona in a Kill lane.
Even tho her range is lower than Vayne's with a Sona on her side and her W, she should be way safer down there then in mid + with rushing SotEL you get waveclear, effectively making you a more useful player than being a pressured mid player who has to waveclear and do a move in order not to fall behind.

/With the blue build, you should be able to trick and kite bruisers with your slow/snare +amor pen and +armor to be safe. ADC and supports should be bursted down easily aswell (+armor against adc + true dmg +so much magic dmg, he cant buy only def) and you got silence for support...
Mages should be a bit tricky as you don't have Mres (Maybe here is where the build can be changed to Triforce/Wits end when you dont need Armor) being up against an Ahri you can still W/R away and position yourself fine..

Ohh...ohhh...I like that, I like that a lot...never thought of a blue build on her seeing as I despise the blue build...at least on Ezreal. But I love the thought of it on Leblanc strangely enough. I must try this, it seems interesting to say the very least.

I tried a 'blue build' you should have a look into it.
SotEL / Manamune->Muramana / Last Whisperer / Iceborn (Maybe Trinity here) / Phantom Dancer /attack speed boots

Did around 292 dmg with AA that is without the True dmg from Spirit and without the spellblade (up to 350 with it + 40 True and a 30% crit chance + Slow)

You can still toggle the Muramana on which should give you another ~150 dmg.

I liked it alot Spirit will give you good health/mana reg + True dmg, Muramana does great dmg / Iceborne slows so you will hit your snare easily + Armor + Mana (Good for Muramana too) / Phantom lets you crit and run thru units for great escapes

Really? I did not know that...I really just figured it was really only worth getting only if the enemy starts to get some heavy armor items. The more I think about this the better it seems...thank you.

LW is the most cost-effective damage item on most AD champions even against enemies with base armor.

Well thing is, LW is only effective after they pass a threshold on armor before it becomes effective. And it's already in the build as situational, not everyone stacks armor that much anymore due to how powerful health became in S3. That's why I put it where it is, you won't build a LW every game. Same as a Warmogs or Guardian Angle. But it's still there if you need it. The Zhonya isn't just for damage, you already have the mastery for magic pen and some bonus AP so it does add a decent amount of damage over all, it's more for the utility and armor. It's alot better in the sense of QSS because you're invulnerable instead of just cleansing whatever stun might be on you at the time. :)

Skill order is already in the guide. :)

Oh man I'm bad at reading.

skill order pls

Replace Bloodthirster with Last Whisper; you won't do any damage to anybody with armor without it, and you won't be doing much magic damage to them either with just Zhonya's Hourglass.

Second, turn on comment to vote. Once you do those two things, I'll upvote.