Yasuo vs Cassiopeia

Hit twice with Steel Tempest (Q), on minions if needed, to charge the whirlwind. Cast it during Sweeping Blade (E): the strike becomes a circle.

Keep moving before taking a trade: Way of the Wanderer (passive) builds your shield while you move, and it triggers on the first hit you take.

Chain Sweeping Blade (E) on different targets to reposition or dodge: each target has its own cooldown, so the spell comes back almost instantly.

Save Wind Wall (W) for a projectile that decides the teamfight, like Jinx's ult, rather than for poke: it blocks for 4 seconds, on a 25 to 17 second cooldown.

Watch for your allies' knock-ups: Last Breath (R) can be cast on any airborne champion, whether the knock-up comes from your whirlwind or Malphite's ult.

Dodge Noxious Blast (Q): without poison on you, Twin Fang (E) deals much less damage and doesn't heal her.

Walk around the Miasma (W) clouds: inside, you're slowed and can't use dashes or jumps.

Turn your back to her when she casts Petrifying Gaze (R): facing her, you're stunned; facing away, you're only slowed.