Riki + Warlock

Why this works

Applying Fatal Bonds to a group of enemies completely changes how Riki functions. His Blink Strike and backstabs, normally focused on a single hero, now deal significant damage to the entire linked group. This allows Riki to contribute to wiping a whole team instead of picking off one support. Warlock provides the perfect setup for this with Chaotic Offering, locking down multiple targets long enough for Riki to get in position. The long stun from the Golem drop gives Riki a free window to use Tricks of the Trade on the bonded targets for massive area damage.

The game plan revolves around Warlock's ultimate timing. Once it's ready, the pair can hunt for a fight. An ideal engagement starts with Warlock's stun, followed immediately by Bonds and Riki's initiation. Opponents are forced into a bad position; if they group up to survive Riki, they melt from the shared damage. If they spread out to avoid the Golem and Bonds, they become isolated and easy for Riki to hunt down individually. Their main counterplay is trying to burst Warlock before he can cast his spells, which is difficult against a hero who plays from the back line.