Ancient Apparition + Phoenix

Why this works

Landing a big Ice Blast on multiple enemies stunned by Phoenix's Supernova can secure a teamfight. The shatter damage is a clean follow-up to the stun, preventing anyone from healing and escaping. The trouble is in the execution. Ice Blast has a long travel time and a global range, while Supernova is a fixed-area spell often used reactively. This makes timing the combination difficult without excellent communication. In the laning phase, both heroes can harass from a distance with spells like Icarus Dive and Cold Feet, but they lack the reliable lockdown needed to set up kills for one another, often resulting in a passive lane.

Across the game, both heroes want to play from the back lines, throwing out area-of-effect damage. This can be effective against teams that group up, but it also means neither Ancient Apparition nor Phoenix offers much peel or frontline presence. They are both vulnerable to being jumped on and killed before they can cast their most important spells. Without a strong initiator or another support to provide lockdown and protection, this duo can find themselves unable to execute their game plan. Their success together relies heavily on the rest of their team's draft to create the space they both need.