Sett & Blitzcrank Synergy
Sett Top and Blitzcrank Support win 51.5% of 4,730 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
Rocket Grab (Q) drags a target toward Blitzcrank, while Facebreaker (E) pulls enemies toward Sett; players describe using Sett's E to bring someone into a Blitzcrank hook, creating a direct follow-up between the two pulls.
How to play as Sett
If Blitzcrank's Rocket Grab (Q) is ready, use Facebreaker (E) to pull a target at the edge of his range into the hook; if it stuns, follow with Haymaker (W) while they cannot move.
How to play as Blitzcrank
When Sett is close enough to follow, use Rocket Grab (Q) to start the catch and hold Power Fist (E) until the target reaches you, giving Sett time to add Facebreaker (E) or The Show Stopper (R).
Sources
These notes come from r/settmains, checked against the champions' abilities.