Ekko vs Aurelion Sol

Throw Timewinder (Q) at a champion, then position so the device passes through them again on its way back: it expands into a slowing field, and the return hits again.

Hit with Timewinder (Q) out and back, and weave in the empowered auto from Phase Dive (E): the third hit triggers Z-Drive Resonance (passive), with bonus damage and speed.

Cast Parallel Convergence (W) where the fight will happen, then step into the sphere when it appears: you stun the enemies inside and gain a shield.

Engage, deal your damage, then cast Chronobreak (R): you return to where you were 4 seconds earlier, in stasis, and recover health based on what you lost.

Stay behind your minions: Breath of Light (Q) hits the first enemy in its path, and only the seconds spent on a champion give him Stardust.

Play hard early and don't let the game drag on: with Cosmic Creator (passive), each of Aurelion Sol's abilities grows permanently stronger through Stardust.

Leave Singularity (E) quickly: it pulls you toward its center, where it executes enemies below a health threshold, and each second inside gives him Stardust.