Drow Ranger + Luna

Why this works

Putting two greedy, ranged cores on one team often stretches the map's resources thin. Luna needs to hit jungle camps and lanes with Moon Glaives to accelerate her farm, and Drow Ranger wants to do the exact same thing, using her superior range to clear creeps from a safe distance. While Drow's Marksmanship gives Luna a bit of agility, it doesn't solve the core problem: they both want to be the primary physical damage dealer and occupy the safest farming triangle on the map. They end up competing for gold instead of complementing each other's timings.

This conflict usually means one hero is forced into a slower start, unable to farm as efficiently as they need to. The team structure becomes very rigid, as you have to dedicate immense resources to protecting two immobile glass cannons. If the enemy applies early pressure, it's difficult to defend both Drow and Luna, and one of them will likely fall behind schedule. You’re basically hoping the enemy gives you a free pass for the first half of the game, which rarely happens.