Mordekaiser & Yone Synergy
Mordekaiser Top and Yone Mid win 55.0% of 11,320 Low Elo games together, +1.6 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
Death's Grasp(E) can pull several enemies into Mordekaiser's area, and Yone can follow that grouping with Fate Sealed(R) to knock them up and pull them together again. Since Mordekaiser's engage is telegraphed, the combo works best when Yone holds R until the pull catches multiple targets.
Playing the duo
Death's Grasp(E) pulls enemies into Mordekaiser's area, giving Yone a group for Fate Sealed(R), which can knock up and pull together the enemies it hits.
How to play as Mordekaiser
Signal before using Death's Grasp(E) so Yone can line Fate Sealed(R) through the group; your pull is telegraphed, and Yone's follow-up supplies the hard crowd control.
How to play as Yone
Wait for Mordekaiser's Death's Grasp(E) to catch multiple enemies, then cast Fate Sealed(R) through the grouped targets instead of using it before his setup lands.
Sources
These notes come from r/MordekaiserMains, checked against the champions' abilities.