Across 1,428 ranked games on patch 16.21 in Master and above, Yone mains win 51.9% of their games in the mid lane.
Their most common build appears in 57.6% of those games and wins 53.2% of its 823 games.
It starts 
two Health Potions and 
Doran's Bow, completes 
Immortal Shieldbow, 
Infinity Edge and 
Death's Dance in that order, and takes 
Berserker's Greaves.
Two other builds are played often enough in the mid lane to be measured on their own.
In the mid lane, Yone mains fare best against 
Zed (won 72.2% of 36 games), 
Locke (won 65.9% of 44 games) and 
Akshan (won 65.2% of 23 games).
Their hardest matchups, the champions that counter Yone, are 
Katarina (won 30.0% of 30 games), 
Hwei (won 20.0% of 10 games) and 
Orianna (won 36.7% of 30 games).