Viper + Warlock

Why this works

Controlling a teamfight with this pair can feel redundant. Both Viper and Warlock excel at slowing enemies and applying damage over time, but their kits don't cover each other's weaknesses. Viper brings constant corrosive slows and Warlock can spread damage with Fatal Bonds, but the combination lacks reliable hard lockdown. Outside of Chaotic Offering, there isn't enough instant control to hold an enemy in place for Viper's damage to accumulate and become lethal. Mobile heroes can often create distance from the combined slows, resetting the engagement and leaving the pair without a secure target to focus down.

The game plan often relies on Warlock landing a big ultimate, creating a zone where Viper can then apply his poisons. This strategy is fairly slow to execute and can be predictable. Enemy teams with good disengage or spell immunity can simply reset the fight or ignore the magic damage entirely. Because both heroes focus on sustained damage rather than burst or chains of stuns, they can struggle to secure kills before opponents can react or turn the fight around. They don't enable each other so much as they do the same job side-by-side, which often isn't enough.