AP Corki mid is actually amazing
Start Doran's Blade for sustain, more HP, better AA trading in laning phase. Tear -> Sorc boots & Haunting Guise -> Finish the Archangel & Liandry -> Luden's Echo -> Void Staff -> Final item Final items that work: Lich Bane (Insane splitpush, better 1v1) Zhonya (Safety) Rabadon (Damages, although pen is better than AP on this build) Rylai (More tankshred, permaslow with your R) Abyssal (Even more magpen, defense against magic dmg) etc.
More safety than Kog'maw (Kog's biggest problem) More waveclear than Ezreal (Ezreal's biggest problem) Magic damage instead of physical, so harder to counterbuild More effective against tanks than Varus and Jayce Lower range than Kog, higher range than Ez Poke is easiest to land of the three AP poke champs of midlane
Tested in platinum solo queue, works fine.