Tristana & Yuumi Synergy
Tristana ADC and Yuumi Support win 53.5% of 6,179 Low Elo games together, +3.6 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 Tristana's jump and add movement speed, attack speed, healing, and a slow to her commit. That lets Tristana take an all-in more freely once the enemy's key crowd control is spent.
Playing the duo
Yuumi's W keeps her attached to Tristana as she repositions, while Yuumi's E adds attack speed and a shield and her Q can slow the target Tristana is chasing.
How to play as Tristana
Wait for the enemy's key crowd control to be used before jumping in so Yuumi can follow without being interrupted; her follow-up is strongest when your all-in has a safe exit or reset.
How to play as Yuumi
Stay ready to follow Tristana's jump with Q and E, but do not spend every cooldown before she commits; hold healing or Exhaust for the actual all-in.
Sources
These notes come from r/TristanaMains, checked against the champions' abilities.