Shadow Fiend + Razor

Why this works

Fighting with this duo can feel like two separate plans are happening at once. Razor wants to use Static Link and run down a single, high-priority enemy, draining their damage and chasing them with Eye of the Storm. At the same time, Shadow Fiend is trying to find the perfect position to either land his Shadowrazes or commit with a big Requiem of Souls. The main issue is that neither hero provides the hard lockdown the other wants. Razor can't hold someone in place for SF's ultimate, and Shadow Fiend offers no stuns to keep an enemy from breaking Razor's link and running away.

This pairing relies heavily on the rest of the team to provide initiation and control. If your draft already has strong stuns, it can work; Razor and Shadow Fiend can follow up with a massive amount of damage. Without that setup, though, they can feel disconnected. They both tend to occupy a similar core role, needing items and levels to hit their mid-game timing. If the enemy lineup is mobile, both heroes can struggle to apply their damage effectively, leaving your team feeling like it has two powerful engines but no way to connect them to the wheels.