Lich + Templar Assassin

Why this works

Trying to land a quick kill with Templar Assassin can feel disjointed when Lich is the one providing support. TA relies on getting off her Meld strike and subsequent attacks very quickly, but Lich lacks the instant lockdown she needs. His slows from Frost Blast are helpful, but his main disable, Sinister Gaze, is a channel that pulls the enemy toward him. This can accidentally drag TA's target out of her attack range right after she blinks in, completely ruining the burst attempt. While Frost Shield is great for helping her survive with its damage reduction, the duo's offensive tools don't line up well.

This disconnect becomes clear during Templar Assassin's mid-game power spike. She wants to be proactively hunting for solo pick-offs with her new items, but Lich is a more defensive hero who excels in protecting teammates and controlling larger fights. He can't really initiate ganks for her across the map. This forces TA to play more passively or rely entirely on her own Blink Dagger for setup, making her predictable. For the pairing to work, Lich has to play uncharacteristically aggressively, or TA has to wait for teamfights that her pick-off style doesn't naturally create.