Invoker + Treant Protector

Why this works

Landing a big Invoker combo often relies on a teammate's setup, and Treant Protector’s Overgrowth can provide that opportunity. The area-of-effect root holds enemies in place, giving Invoker a window to line up spells like Meteor and Deafening Blast without needing to use his own Tornado first. This frees him up for more damaging spell combinations. In the early game, a global Living Armor on a mid Invoker can also make a difference against harassment, helping him sustain through a tough lane and secure the farm he needs for key items. It's a small but consistent bit of support that helps him reach his timings.

In practice, this synergy is heavily tied to Overgrowth's long cooldown. For most of the game, the two heroes operate independently. Treant Protector will be making plays elsewhere on the map, and Invoker has his own ways to set up kills with Cold Snap or Ice Wall. The pairing doesn't fundamentally change how either hero wants to play the game. Instead, it creates a powerful option during major teamfights when their ultimates are available. It’s a useful tool to have in your pocket, but not a strategy that defines the entire draft.