Pangolier + Phoenix

Why this works

Rolling Thunder can create the perfect setup for a Phoenix Supernova. Pangolier stuns key targets as he crashes through the fight, giving Phoenix a clean window to drop the egg without getting interrupted. Once Supernova is active, Pangolier can use his mobility from Swashbuckle and Shield Crash to weave around the fight, drawing attention and body-blocking for the egg. Phoenix can also get Fire Spirits off before the ultimate, and the attack speed slow makes it that much harder for enemies to focus down the sun before it explodes.

The core issue holding this pair back is coordination. Both ultimates are major commitments with long cooldowns, and if their timings are even slightly off, the whole sequence fails. Pangolier might roll in too early, leaving Phoenix behind, or Phoenix might drop Supernova defensively when Pangolier wants to be aggressive elsewhere on the map. They both want to be the center of a teamfight, but their positioning needs are different. Pangolier is constantly moving around the edges, whereas Phoenix becomes a static, vulnerable target. This can lead to fights where they don't effectively cover each other, making the combination unreliable.