Katarina & Yuumi Synergy

Katarina ADC and Yuumi Support win 59.1% of 1,703 Low Elo games together, +4.4 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

Yuumi can stay attached through Katarina's Shunpo(E) resets, adding on-hit healing and damage to Katarina's repeated attacks and Death Lotus(R). Yuumi's Zoomies(E) also adds attack speed and a shield during Katarina's dive, helping her stay in the fight for more resets.

Measured in High Elo: this duo wins 2.9pp more often than expected over 1,245 games.

Playing the duo

Yuumi's Prowling Projectile(Q) adds on-hit damage to her best friend and You and Me!(W) grants on-hit healing; Katarina's Death Lotus(R) applies repeated hits, so both effects add up during her channel.

Yuumi's Zoomies(E) grants attack speed while attached, and Katarina's ultimate gains damage from attack speed, increasing the value of a timed shield during her dive.

How to play as Katarina

Call your target before diving so Yuumi can land Prowling Projectile(Q) and attach first. Use Shunpo(E) resets to stay in range while Yuumi's shield and on-hit healing keep you alive through the channel.

How to play as Yuumi

Attach to Katarina before she commits, then use Zoomies(E) during Death Lotus(R) to add attack speed and protect her while the on-hit effects stack. Stay ready to follow her Shunpo(E) resets.

Sources

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