Storm Spirit + Templar Assassin

Why this works

Drafting these two heroes together creates an immediate problem of resource allocation. Both Storm Spirit and Templar Assassin are tempo-driven cores who thrive on getting an early advantage from solo experience and farm, which they typically get from the mid lane. They both need to hit key levels and item timings to start dominating the map. When they share a team, one is forced into a less ideal role, which significantly delays their power spike. Furthermore, their kits don't complement each other well; they both want to burst a single target, but neither provides the reliable, long-duration lockdown the other needs to guarantee their damage.

This conflict plays out by forcing them to compete for the same farming areas across the map. A Storm Spirit looking for camps to fuel his mana-intensive ganks is taking away the stacks a Templar Assassin needs to accelerate her own farm. In fights, Storm's mobility doesn't help TA land consecutive hits, and TA's static damage from Meld strikes doesn't benefit from Storm pulling enemies around with Electric Vortex. This leaves the enemy team free to group up and force objectives, knowing that their opponents' core duo is inefficient and lacks synergistic teamfight presence.