Lifestealer + Zeus

Why this works

Securing map control becomes much easier when your team has global reach. Zeus can reveal and damage the entire enemy team with Thundergod's Wrath, no matter where they are. This vision creates the perfect setup for Lifestealer's Infest, allowing him to possess a creep or allied hero and travel across the map for a gank. Once Lifestealer arrives, he can use Open Wounds to slow the target, making it easy for both him and Zeus to finish the job with their combined damage. This combo turns two heroes farming their own lanes into a constant threat.

From the mid-game onward, every Zeus ultimate becomes a potential death sentence for any enemy hero caught out of position. This forces the opposing team to play defensively, group together, and give up large portions of the map, which the Lifestealer's team can then convert into towers and other objectives. The only real counter is for the enemy to maintain excellent vision and try to burst down the fragile Zeus before he can enable these plays, as Lifestealer himself doesn’t have many tools to protect a backline ally who gets jumped.