Crystal Maiden + Disruptor

Why this works

Combining a lot of control onto one target can feel strong. Crystal Maiden's Frostbite offers a perfect setup for Disruptor to land a guaranteed Kinetic Field, locking down an enemy for a long time. The mana from Arcane Aura is also a huge help, as Disruptor can be more liberal with his spells throughout the early and mid game. In teamfights, if they can coordinate, the combination of Static Storm and Freezing Field creates a massive zone of control that enemies can't easily fight into. This duo can chain their spells together to secure kills on anyone they catch out of position.

The problem is that both heroes are very fragile and lack mobility. A lane with Crystal Maiden and Disruptor is extremely vulnerable to aggression; if an enemy carry and support decide to run at them, neither has a reliable escape or a way to save their partner. They both rely on getting the jump. If they initiate successfully, they almost always get a kill. If they get initiated on, they both tend to die instantly. This makes the pairing feel very feast-or-famine, entirely dependent on which team dictates the engagement and whether these two supports can get their spells off before being focused down.