This is my Yasuo with smite build, I'll test it and update it as I go. TAKE THIS SERIOUSLY I am ,and if your a youtuber that just happened to look at and use this build(highly unlikely) then link this in your vid please xD. PM me to help me with this guide creating thing(first time) or have any questions.

Item build updated example build is core build. Played two games with this build and basically maped out what this does, pros and cons. This build is actually really high risk high reward, you do so much damage in the mid game its insane, but you lack sustain. When you get cc'ed in a teamfight you're done for. The Skirmisher's reduce 20% of the targets damage dealt to you, Phantom Dancer reduces 12% for a total of 32% reduced damage and you'll only need these 2 items to max your q's cd of 1.33 seconds at around lv 10 (not sure gonna test it out) allowing for great dueling potential. After rushing Skirmisher's and Phantom Dancer you get cloak for the 100% crit then sheen for the extra damage which buffs your attack A LOT, If you have boots and health pots at that point your inventory will be maxed out, so i sell my Doran's blade to go for infinity edge. After the 240% crit damage power spike you can either build your sheen into tri-force for even more damage if your fed enough and the enemy doesn't do enough damage to you or a iceborn gauntlet for armor and the passive slow.
That basically wraps up update number 1.
P.S. I was looking around Youtube and found out that Redmercy made a video talking about taking red smite. Still some differences in my build compared to his though.(BTW i thought of the build myself but I was still slower than redmercy :/ )
His video link: https://www.youtube.com/watch?v=F5y2Eand1_0