Spirit Breaker + Windranger

Why this works

Getting caught by a Charge of Darkness often means you're about to be stunned for a long time. The initial lockdown from Spirit Breaker gives Windranger an almost perfect window to land a follow-up Shackleshot, an ability that can be tricky to connect otherwise. This sequence can lock a single hero down long enough for a fully channeled Powershot or a barrage of attacks from Focus Fire. On paper, it's a simple and effective ganking partnership that can punish any hero caught out of position, turning one hero's long-range initiation into a near-guaranteed kill for the other.

The problem is that this entire play relies on finding isolated targets. When teamfights break out, the combo becomes much less reliable. Spirit Breaker often charges deep into the fight, but Windranger may not be able to follow him into the middle of the enemy team safely. If the initial target gets a save from a teammate, both heroes have committed their key spells with little to show for it. This leaves them vulnerable to a counter-attack, as neither hero is particularly durable if focused. The success of the duo depends heavily on the enemy team staying split.