Heimerdinger & Kayn Synergy

Heimerdinger Top and Kayn Jungle win 53.4% of 1,970 Low Elo games together, +1.2 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

Heimerdinger naturally pushes, leaving opponents exposed under their tower; Kayn can enter through terrain with Shadow Step(E), while Heimerdinger's grenade stun helps secure the dive and Kayn's Umbral Trespass(R) can finish a low-health target.

Playing the duo

Heimerdinger's CH-2 Electron Storm Grenade(E) stuns a direct hit, giving Kayn time to finish a target during a dive.

How to play as Heimerdinger

Save CH-2 Electron Storm Grenade(E) for Kayn's arrival and aim for the direct hit; its stun gives him a safer window to complete the dive.

How to play as Kayn

Use Shadow Step(E) to approach from a wall for a tower dive, and save Umbral Trespass(R) to finish the low target or escape after the dive.

Shadow Step(E) lets Kayn approach through terrain, creating a route into the lane even when Heimerdinger has pushed the wave toward the enemy tower.

Sources

These notes come from r/HeimerdingerMains, checked against the champions' abilities.