Spectre + Treant Protector

Why this works

Using Haunt to isolate a target becomes more reliable with a Treant Protector on the team. Once Spectre commits, Overgrowth can root the enemy in place, preventing escapes or teleports. This combo makes it difficult for a single hero to survive a gank, even under their own tower. Beyond the gank potential, Treant's Living Armor provides global protection. Applying it to Spectre during the laning stage gives her some welcome survivability, helping her get through a phase of the game where she is often vulnerable and needs to focus on farming.

This pairing encourages a patient game plan. Spectre focuses on her farm, knowing Treant can assist her from anywhere on the map. The threat of their combined ultimates forces the enemy team to play with care, as grouping up for an objective can be punished by a Haunt into Overgrowth. The opponent's best response is to apply heavy pressure on Spectre's lane early and try to end the game before she gets her core items. They also need to maintain vision and spread out to limit the effectiveness of the combo.