Your Win Condition
Win the all-in when the wave is pulled back to your turret, especially after identifying and playing around her chosen keystone rune.
General Strategy
Use Ghost and Flash, with D-Blade being a slight preference. Crucially, identify her rune setup in the loading screen. Go Tier 1 boots early into Stridebreaker. Hexdrinker is generally unnecessary unless the enemy team has an AP jungler.
Trading Patterns
If she has Phase Rush: Use a first trade (Q, run at her) to pop the Phase Rush, then immediately run away. You commit to the all-in on the second Q when Phase Rush is on cooldown. If she has Conqueror: All-ins are easier, but the matchup is more skillful. Volatility benefits you. Use Flash to follow her Flash during your all-in near the tower.
Wave Management
You want to get priority early, as Level two Cassiopeia deals massive damage. Aim for a two-wave crash (or a three-wave crash if she is playing extremely aggressively). After the crash, play passively and let the wave come all the way back to your tower.
Their Win Condition
Using Phase Rush (if taken) to kite you and prevent extended trades. Relying on massive damage spikes at level two and three.
