Ember Spirit + Slardar

Why this works

Getting hit with Corrosive Haze followed by an immediate Sleight of Fist is a scary prospect. Slardar's ultimate sets up a perfect target for a physical Ember Spirit to tear apart. Slithereen Crush also provides an easy setup for Searing Chains, creating a simple lockdown and burst combination. The issue is one of timing and damage types. Early on, much of Ember's damage is magical from Flame Guard, which gets no benefit from the armor reduction. Slardar provides the physical setup, but Ember Spirit often isn't ready to fully capitalize on it until he has several items.

This duo's game plan revolves around hunting for pickoffs. Slardar can sprint around the map, find a target, and stun them for Ember to finish off. This can work well to build a lead. The strategy becomes less reliable in full teamfights, however. Slardar commits hard with his initiation, but if the primary target is saved or the enemy team is grouped, he is left exposed. Ember Spirit can usually escape with a Fire Remnant, but this often leaves Slardar to die alone. The entire game depends on their ability to execute this single-target burst, and it can easily be disrupted by coordinated opponents.