Medusa + Silencer

Why this works

Pairing Global Silence with Stone Gaze seems like it should lock down a teamfight, but in practice, the two ultimates often get in each other's way. Enemies caught in Silencer's ultimate can't cast spells, but they are still free to simply turn around and walk away from Medusa, avoiding her petrifying gaze entirely. Using both abilities at the same time is usually redundant; you're either silencing enemies who are already petrified, or silencing enemies who can still physically escape the bigger threat. There's an overlap in function without a clean way to chain the two effects together for a guaranteed result.

This tension extends to how each hero wants the game to be played. Medusa needs to farm safely and avoid conflict for a significant portion of the match to build her core items. Silencer, on the other hand, is strongest when he's constantly involved in fights and skirmishes across the map, building up his power through kills and assists. This creates a conflict in tempo. Either Silencer is trying to force fights that his carry isn't ready for, or he is forced to play passively to protect Medusa, which dulls his own impact.