Gragas & Qiyana Synergy
Gragas Top and Qiyana Jungle win 44.0% of 728 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
Body Slam(E) stuns and Explosive Cask(R) displaces enemies; if Gragas holds them near terrain, Qiyana can follow with Supreme Display of Talent(R) for its terrain-triggered stun.
How to play as Gragas
Use Body Slam(E) to hold a target or aim Explosive Cask(R) toward nearby terrain, giving Qiyana a clear wall angle for her follow-up ultimate.
How to play as Qiyana
Let Gragas start with Body Slam(E) or a well-aimed Explosive Cask(R), then angle Supreme Display of Talent(R) so the follow-up catches enemies against terrain instead of spending both engages separately.
Sources
These notes come from mobafire.com and r/QiyanaMains, checked against the champions' abilities.