Kayle vs Sett

Play safe early on: Divine Ascent (passive) empowers your autos with each level, adding range, speed and waves of fire.

Save Celestial Blessing (W) to escape a gank or hold your lane: it heals you and an ally, and gives you both move speed.

Push the wave as soon as you unlock your waves of fire: Divine Ascent (passive) adds them to your autos, and minions go down much faster.

Cast Divine Judgment (R) on the ally being focused, at the last moment: they become invulnerable, then the area around them damages enemies.

Get out of the center of Haymaker (W): it deals true damage there, and the sides only deal physical damage.

Keep your distance once Knuckle Down (Q) is used: he has no dash, and it's this spell that speeds him toward you.

Don't take a big trade unless you can finish it: Haymaker (W) stores part of the damage he takes as Grit, for a stronger shield and punch.

Don't stay grouped behind your tank: The Show Stopper (R) can slam them onto you, and the damage depends on their bonus health.