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Overview

Role Plan

Danger Windows

Early Game

Power Spikes

Win Conditions

Cassiopeia vs Diana MID Matchup Guide | LaneStomp

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Champion

Opponent

RoleGenerate matchup

Cassiopeia

VS

Mid

Diana

Cassiopeia vs Diana

Confidence mediumUpdated Jun 10, 2026

Overview

Control mid-range spacing to force Diana into extended trades where repeated (E) excels.
Maintain medium lane pressure to deny Diana easy all-ins and burst windows.
Use (W) to ground Diana's mobility and prevent dash resets.

Trading pattern

Start trades by landing (Q) or (W) to apply poison and slow Diana.
Use repeated (E) casts to outdamage Diana in extended fights.
Punish (E) cooldown by stepping forward to trade aggressively.

Danger windows

Diana is most dangerous when (Q) and (E) are up, especially with Electrocute.
Avoid extended trades or standing in front of (R) when Diana reaches level 6.
Be cautious if (W) is down, as Diana can dash or escape more freely.

Early game

Use (Q) to apply poison early and punish Diana if she misses her (Q).
Hold (W) to ground (E) dash and prevent her from resetting it.
Avoid trades without poison or when (W) is down to reduce burst risk.

Power spikes

Level 6 (R) punishes Diana's all-in if she faces you during engages.
First mana/AP item boosts sustained damage and mana for longer trades.
Respect Diana's level 3 burst combo by avoiding extended trades before then.

Win conditions

Win by landing poison and forcing Diana into extended trades to out-DPS her.
Use (W) to deny Diana's mobility and lock her into unfavorable fights.
Capitalize on (R) stun when Diana commits and faces you during all-ins.

Tip: For Cassiopeia vs Diana, read overview, trading pattern, and danger windows first for a fast Mid lane check.

Updated Jun 10, 2026New matchup