Dark Willow + Rubick

Why this works

Drafting these two supports together creates a lane with a lot of control, but it also doubles down on having fragile, magic-focused backliners. Rubick can set up Dark Willow's Cursed Crown perfectly with Telekinesis for easy kills early on. The issue is that both heroes occupy a similar role. Neither offers a durable frontline presence or a strong defensive save for their cores. This means your team composition can become very vulnerable to pickoffs and heavy physical damage if the other picks don't compensate. They both tend to want levels and items to be effective, which can also stretch the team's resources thin.

The laning phase often looks good because of their kill potential. As teamfights start happening, however, the lack of inherent survivability becomes a problem. Teams that can dive the backline can often neutralize both Dark Willow and Rubick before they can unload their full spell rotations. For this pair to succeed, the cores often have to draft significant lockdown and durability themselves. The responsibility shifts to the rest of the team to create the space and frontline that these two supports simply cannot provide on their own, making the overall draft less flexible.