Doom + Marci

Why this works

Drafting both Doom and Marci onto the same team can create a problem of redundancy. Both heroes are specialists at isolating and neutralizing a single target. Marci uses Dispose and Rebound to get on top of an enemy and set them up for a burst, while Doom wants to apply his ultimate to render one key opponent useless. When their efforts overlap onto one hero, it's often inefficient. Committing Marci's entire Unleash combo to a target that has already been Doomed feels like a waste, as that hero is already out of the fight and the damage could be better used elsewhere.

This potential for overlap persists throughout the game. Their laning needs can be at odds, with Doom focused on his own economy through Devour while Marci is looking to make aggressive moves. Later on, choosing targets in a teamfight becomes complicated. The ideal hero for Doom to shut down, like a support with saves, is rarely the same hero that Marci wants to brawl with. While they can coordinate to instantly remove one enemy from the map, this requires a lot of communication and can leave the team without enough control or damage to handle the remaining opponents.