Anti-Mage + Shadow Fiend

Why this works

Putting two fast-farming cores on the same team can feel like a solid plan to out-scale the enemy, but Anti-Mage and Shadow Fiend end up stepping on each other's toes. Both heroes need an enormous amount of gold and experience to become effective, forcing them to compete for the same jungle camps and safe lane farm. Their kits also offer very little to one another; Anti-Mage needs allies who provide lockdown and can save him, while Shadow Fiend excels with a strong frontliner holding enemies down. This lineup lacks both of those crucial elements, leaving two greedy cores to fend for themselves.

This clash for resources creates a long, dangerous window in the mid-game where your team is incredibly easy to pressure. Enemies can confidently group up and take objectives, knowing your two strongest heroes are split across the map and unable to fight effectively. Even if the game goes late, teamfights are awkward. Without a real initiator, the pair has to wait for a perfect Mana Void opportunity or for an enemy to wander into Shadow Fiend's range. It creates a fragile game plan that is easily broken by early aggression.