Cho'Gath & Ezreal Synergy
Cho'Gath Top and Ezreal ADC win 48.6% of 3,466 Low Elo games together, +1.4 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
Why this duo works
Cho'Gath's Rupture and Feral Scream can hold enemies in place or interrupt them, helping Ezreal land his skillshots from range. Cho'Gath also provides a frontline so Ezreal can keep dealing damage from a safer position.
Playing the duo
Rupture knocks enemies up and Feral Scream silences them, giving Ezreal time to land Mystic Shot or Essence Flux.
How to play as Cho'Gath
Use Rupture or Feral Scream to hold a target in Ezreal's range before he uses his combo.
How to play as Ezreal
Follow Cho'Gath's knock-up with Essence Flux and Mystic Shot, and keep your distance while he serves as the frontline.
Sources
These notes come from leagueoflegends.com, checked against the champions' abilities.