Bloodseeker + Invoker

Why this works

Getting low on health anywhere on the map puts an opponent on a timer. Bloodseeker's vision on wounded targets gives Invoker perfect information to land a global Sun Strike, punishing anyone who tries to retreat to safety. This dynamic makes ganks more lethal and forces enemies to be much more careful with their health pools from the earliest stages of the game. If an enemy tries to run while under the effect of Rupture, the constant damage ticks can also repeatedly trigger Invoker's Cold Snap, locking them down for an easy kill without Invoker even needing to be nearby.

This pairing provides consistent kill threat, but it relies on finding an already-weakened target. In the mid-game, a Ruptured hero that is forced to stand still becomes a sitting duck for Invoker's full spell combination. The counterplay is for opponents to stay grouped and healthy, avoiding the low-health state that turns on Bloodseeker's Thirst. While Bloodseeker and Invoker don't have a big wombo-combo, the constant global pressure they can apply makes it difficult for enemies to find a safe moment to recover, creating opportunities that wouldn't otherwise exist.