Shaco & Yone Synergy
Shaco Jungle and Yone Mid win 53.3% of 4,995 Low Elo games together, +1.7 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
Yone's multi-target engage gives Shaco time to place a box fear in the same area, and Shaco's slow helps Yone keep up with anyone who escapes the first hit. That chain crowd control explains the clear HIGH ELO synergy.
Measured in High Elo: this duo wins 1.5pp more often than expected over 1,031 games.
Playing the duo
Yone's Mortal Steel(Q) at two stacks and Fate Sealed(R) knock up or pull targets, while Shaco's Jack In The Box(W) fears nearby enemies and Two-Shiv Poison(E) slows them. Shaco players specifically recommend placing boxes as Yone ults to chain crowd control.
How to play as Shaco
Place Jack In The Box(W) in the area Yone is pulling into, then slow a target with Two-Shiv Poison(E) so Yone can stay on them after the fear.
How to play as Yone
Coordinate Fate Sealed(R) with Shaco so he can place Jack In The Box(W) where the pull lands; the airborne lets him set up the follow-up fear.
Sources
These notes come from r/shacomains, checked against the champions' abilities.