Invoker + Io

Why this works

Setting up a gank with Relocate gives Invoker a global delivery system for his spell combinations. An Io tether makes him much harder to pin down, giving him space to land a key Tornado or Deafening Blast. The extra regeneration also helps sustain through the laning phase, letting Invoker focus on farming and hitting his key levels. For Exort-focused builds, the combination of Alacrity and Io's support can also create a surprisingly strong right-click threat.

The success of this pair depends heavily on coordination. A failed Relocate play can be disastrous, feeding two heroes to the enemy and wasting a long cooldown. Invoker is also very experience-dependent, and spending too much time together can slow down his progression. The enemy team will look to split them up or burst down the Io before Invoker can react. The potential for a strong play is there, but it's a specific tool for a specific job, not a general strategy that works every time.