Ahri & Smolder Synergy
Ahri Mid and Smolder ADC win 51.4% of 4,558 Low Elo games together, -0.4 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.
Playing the duo
Charm (E) forces a target to move toward Ahri and stops their movement abilities, creating a more predictable target for Smolder's long-range W and R.
How to play as Ahri
When Smolder is close enough to follow, use Charm (E) to start a pick; his long-range W or R can add damage while the target is controlled.
How to play as Smolder
Follow Ahri's Charm (E) with Achooo! (W) or MMOOOMMMM! (R), aiming the area damage around the target she catches so she can finish the pick with her own spells.
Sources
These notes come from r/AhriMains and r/SmolderMains, checked against the champions' abilities.