Miss Fortune vs Xayah

Fire Double Up (Q) at a dying minion in front of a champion: if the shot kills the minion, the bounce onto the champion always crits.

Switch targets often: Love Tap (passive) adds damage on each new target, and lowers the cooldown of Strut (W).

Activate Strut (W) to get in position before Bullet Time (R): you instantly gain its max move speed bonus, plus attack speed.

Cast Bullet Time (R) on enemies who are CC'd or bunched up in a chokepoint: it's a channeled cone, and each wave can crit.

Don't stand between Xayah and her feathers on the ground: Bladecaller (E) pulls them back to her, and 3 feathers passing through you root you.

If you can engage, go in when she has no feathers on the ground: without them, Bladecaller (E) can't root you.

During Featherstorm (R), hold your spells: she's untargetable for 1.5 seconds, then lands, leaving a line of feathers.