Shaco & Ahri Synergy
Shaco Jungle and Ahri Mid win 49.9% of 4,120 Low Elo games together, -0.2 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
Shaco Q lets him teleport while becoming invisible, and Shaco W fears enemies who trigger the box. Ahri E can charm a target and Ahri R lets her dash into or follow a skirmish, giving the duo ways to layer a gank.
How to play as Shaco
Use Shaco Q to flank a lane Ahri can roam to, and place Shaco W along the likely retreat path. If Ahri lands Charm (Ahri E), follow with your fear and damage rather than revealing your approach first.
How to play as Ahri
Push a safe wave before joining Shaco's river or jungle play. Hold Ahri E for his flank, then use Ahri R to follow the pick or keep pace if the target escapes.
Sources
These notes come from r/shacomains, checked against the champions' abilities.