Ancient Apparition + Warlock

Why this works

Putting these two supports on the same team often creates a greedy laning stage. Both Ancient Apparition and Warlock are looking for levels to unlock their powerful teamfight ultimates, and neither provides strong early aggression or lockdown. While a Chaotic Offering stun can set up an easier Ice Blast, the core abilities don't amplify each other in a special way. Fatal Bonds damage isn't made better by the healing block, and the healing block doesn't need Fatal Bonds to be effective. They're two strong spells happening near each other, not working together.

As a result, the game plan becomes very one-dimensional. You have to survive a potentially weak early game in the hopes of winning mid-game teamfights with your two big spells. A successful combo can certainly win a fight, but the lineup struggles to create its own opportunities. Without reliable catch, mobile enemy teams can often split the map, avoid direct confrontation, and pick off your cores. Your success relies on the enemy playing into your slow, telegraphed strength instead of you controlling the game's tempo.