Use Valkyrie to get better position on your enemy or escape enemy ganks.
Get mana items to make sure you can spam Corki's abilities for harass.
LoL Corki players will find him to be a difficult champ to build out properly. You'll see that his build varies when he is playing against either generic or homogenous team compositions, meaning you should not choose the same Corki build every single round of League of Legends
The best items to use in your champion's build are: Trinity Force, Muramana, and Bloodthirster. Players who included these items in their gear had a significantly better winrate than players who tried for other builds for Corki. Similarly, if you are facing a well-mixed enemy team arrangement, you should strongly consider getting him the Inspiration, and Sorcery runes. In recent matches, he won the greatest percentage of his rounds when using these runes.
We calculated our Corki build suggestions by examining 9,725 recently ranked League of Legends rounds with him in them. We only recommend the highest winrate Corki builds that were used by ranked LoL players enough times for us to suggest them. With so many matches in our dataset, we are very confident in our suggested builds.