Malphite & Yasuo Synergy
Malphite Jungle and Yasuo Mid win 51.6% of 2,981 Low Elo games together, +2.3 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
Unstoppable Force(R) gives Yasuo a fast, multi-target airborne setup for Last Breath(R). Yasuo can immediately follow the knockup, turning Malphite's engage into a longer teamfight lockdown.
Playing the duo
Unstoppable Force(R) knocks nearby enemies airborne, which lets Yasuo blink to them with Last Breath(R) and hold the group in the air for his follow-up damage.
How to play as Malphite
When Yasuo is in range, look for an Unstoppable Force(R) that hits several enemies and signal the engage so he can follow with Last Breath(R).
How to play as Yasuo
Follow Malphite's Unstoppable Force(R) promptly with Last Breath(R) while multiple targets are airborne; save the combo for a fight where your team can reach the knocked-up group.
Sources
These notes come from r/leagueoflegends and r/summonerschool, checked against the champions' abilities.