Corki is so strong right now, every other adc getting nerfed but him, I photoshopped this image to show the games I've played today and yesterday with him, I've played a bit more with him before, and results have been good, I've gone against vayne(stomped so hard), MF(It was okay, won but didn't completely stomp), Tristana(stomp), Graves (it was okay, won but didn't completely stomp)
The games I've lost, I wrecked my lane but an enemy was simply too fed, for example that ranked loss, the kayle was like 6/1 when I got out of lane, and could literally 2hit me with the range boost, not even the slow, she had lich bane when laning phase ended, so yeah, she carried hard
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I build botk, finish boots, rush cleaver, and work on trinity force(zeal then phage), IE, and either a defensive item [GA or banshees] and if I am not a target, then PD or Shiv, I prefer Shiv, but PD better for kiting.
I go Q > E > Q > W, then max out Q first [obviously picking R whenever possible], don't engage with W, Ever. Keep it for catching up to the adc or support that flashed away with 100hp, or save it for escape, don't ever poke with skills, only AA, and if they go hard in to poke, then use E, save Q for full engagements.