Templar Assassin + Windranger

Why this works

Mid-game map pressure exposes the core problem with this pairing. Both Templar Assassin and Windranger function as tempo-driven cores who need farm priority and space to secure pickoffs. They excel at bursting a single hero from the shadows or with a well-placed stun, but they don't bring the tools needed for wider teamfight control. A successful Shackleshot can certainly set up an easy kill for Templar Assassin, but beyond that specific interaction, the two heroes find themselves competing for the same camps and gank targets. This overlap often leaves the rest of their team without a durable frontliner or a big area-of-effect spell.

This conflict of interest usually means one of the two has a poor start in a less favorable lane. Later on, your team's entire game plan becomes about finding isolated targets. Experienced opponents will recognize this and counter it by simply grouping together as five. While the Windranger and TA might be able to delete one hero at the start of a fight, they lack the sustained damage or control to handle the remaining enemies. This forces them into awkward fights where they get a trade at best before being overwhelmed by superior teamfight composition.