Sejuani & Irelia Synergy

Sejuani Jungle and Irelia Mid win 55.3% of 694 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.

Playing the duo

Sejuani's Permafrost(E) stuns a champion at maximum Frost stacks, and Irelia's high attack speed lets her add allied attacks quickly after Sejuani applies Frost.

How to play as Sejuani

Focus Frost stacks on the target Irelia is already attacking; her rapid attacks help trigger Permafrost(E)'s stun, extending your crowd-control chain.

How to play as Irelia

After Sejuani applies Frost to a target, keep attacking that same target so her Permafrost(E) stun becomes available quickly.

Sources

These notes come from mobafire.com, checked against the champions' abilities.