

Illaoi vs Heimerdinger Counter Pick
Matchup Summary
What the Data Means
Four hundred and twenty-five units of attack range is the whole story: Heimerdinger fires from 550, Illaoi swings at 125, and Illaoi’s 39.2% across 209 games on patch 16.13.1 is what that produces.
H-28 G Evolution Turret converts the gap into terrain. Turrets hold the wave, chip anyone approaching, and feed Hextech Affinity, the passive granting move speed near allied towers and his own deployments — enough to close the deficit between his 340 base and her 350. Illaoi owns no dash except Harsh Lesson, which requires a target already within reach, so walking forward means eating Hextech Micro-Rockets and a CH-2 Electron Storm Grenade that stuns on a direct hit.
Damage type compounds the problem. Heimerdinger is a magic threat, and Illaoi’s 32 base magic resist scales far worse than her 120 armour at level 18, while her own physical output would meet 90.4 armour if she reached it. Her opening is a single connected Test of Spirit near a wall, since 558 starting health and 19 armour leave nothing to absorb echoed damage. His difficulty rating of 8 sits opposite her 4, so careless turret placement is the realistic path back into the matchup. UPGRADE!!! raises the stakes on every guess, since an empowered grenade stuns a wider area and an empowered turret holds ground on its own, which is the difference between losing a wave and losing the tower behind it.
FAQ
No — current data marks this as a counter matchup: Heimerdinger has the statistical edge. Illaoi wins 39.2% of the recorded games.
39.2% from Illaoi's perspective, measured on patch 16.13.1.
209 ranked games at Emerald rank and above, across all regions.
The current Illaoi build — items, runes and skill order from the same data set — is on the Illaoi build page.