Aurelion Sol vs Locke

Keep Breath of Light (Q) on the same champion: each second triggers a burst of bonus damage and gives you Stardust.

Farm with Singularity (E): every enemy that dies inside, minions included, gives you Stardust, which permanently strengthens all your abilities.

Cast Astral Flight (W) to escape a gank or to chase: during the flight, Breath of Light (Q) has no cooldown and no channel limit.

Cast Falling Star (R) on several enemies: it stuns them, and each champion hit gives you Stardust to upgrade your next cast into The Skies Descend (R).

Back instead of staying in lane at low health: Silver Stake (passive) adds damage to his autos that grows with your missing health.

Trade after Ashen Pursuit (E): it's his only instant movement, and its 10-second cooldown only resets if he gets a takedown.

During Soul Ignition (W), only hit him if you can kill him: at the end, he heals back part of the last damage taken, yours included.

Marked by Purgatory (R), stay above its threshold: if you have a heal or a shield, use it, because he seals marked enemies who drop below it.

If the Purgatory (R) artifact lands, hold the area where it fell: by picking it up, Locke raises his execute threshold for each sealed champion, for the rest of the game.