Kayle vs Irelia

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.

Don't stand near your low-health minions: Bladesurge (Q) resets when it kills, so she chains dashes from minion to minion until she reaches you.

As soon as the first blade of Flawless Duet (E) lands, change direction: the stun only hits enemies caught between the two blades.

Take your trades when Ionian Fervor (passive) isn't stacked: she builds stacks with her abilities, and at max stacks her autos deal more damage.

Save your burst for after Defiant Dance (W): while charging, she takes much less damage, but she can't do anything else.

Dodge Vanguard's Edge (R): its blades make you Unsteady, which resets Bladesurge (Q) on you, and the cage they form damages and slows anyone who crosses it.