Kayle vs Yasuo

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.

Hit him with a cheap attack to trigger the Way of the Wanderer (passive) shield, then start the real trade: otherwise, it absorbs your best damage.

If you have projectiles, save them for after Wind Wall (W): it blocks them all for 4 seconds, on a 25 to 17 second cooldown. Other spells go through it.

Don't stand right behind your minions: each one gives him a target for Sweeping Blade (E), and he gets closer to you with every dash.

Get out of the line of his whirlwind, the third Steel Tempest (Q): without a knock-up, he can't cast Last Breath (R).

Judge his threat by his crit items more than his level: Way of the Wanderer (passive) raises his critical strike chance, so each crit item does more for him.