Cassiopeia - League of Legends Champion
Win Rate
55.2%
Pick Rate
0.8%

Cassiopeiavs Illaoi

SMage
Patch26.7
Matches508,082
LaneAll Lanes
TierAll Tiers
Last UpdatedApr 8, 2026
MethodologyData Methodology

Cassiopeia vs Illaoi is a decisive matchup in LoL patch 26.7. Illaoi wins with a 57.1% win rate (+14.3%) over Cassiopeia based on 7 games. Cassiopeia wins the early laning phase while Illaoi scales better into the late game. Below you'll find the best Cassiopeia build, runes, laning stats, and strategies for the Cassiopeia vs Illaoi matchup.

Cassiopeia Matchup Breakdown

Use the dropdown to select an opponent and see a detailed breakdown of how Cassiopeia performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.

Compare against an opponent
Illaoi - 42.9% win rateIllaoi(42.9%)
Cassiopeia - 42.9% win rate in this matchup
Cassiopeia
42.9% WR
VS
Illaoi vs Cassiopeia matchup - 57.1% win rate
Illaoi
57.1% WR

Who Wins the Cassiopeia vs Illaoi Matchup?

Illaoi wins the Cassiopeia vs Illaoi matchup
Winner
Illaoi
Matches: 7
42.9%
Win Rate
57.1%
6.6
CS / min
6.1
1,025
DMG / min
1,036
13,529
Gold / game
12,763
336
Heal / min
431
725
DMG Mitigated / min
1,534
1.3
CC / min
0.3
50.0%
Early Game WR
50.0%
40.0%
Late Game WR
60.0%

Cassiopeia vs Illaoi Matchup Summary

The Cassiopeia vs Illaoi matchup is a decisive matchup in League of Legends ranked play. Based on 7 recent matches analyzed, Illaoi wins with a 57.1% win rate compared to Cassiopeia's 42.9%, giving Illaoi a 14.3 percentage point advantage. Game phase dynamics play a critical role here: Cassiopeia controls the early laning stage, but Illaoi outscales as the game goes longer. The matchup shifts dramatically depending on game length — Cassiopeia needs to press advantages before Illaoi reaches their power spikes, while Illaoi should focus on safe farming and hitting key item breakpoints. The most significant statistical gap is in crowd control, where Cassiopeia leads by 1.0s CC/min — a difference that heavily influences the outcome of trades and skirmishes. Illaoi has a strong advantage in this matchup. Cassiopeia players should play defensively, prioritize safe farming under tower, and look for opportunities created by jungle pressure or Illaoi overextending. Avoid prolonged trades and wait for team fights where positioning and coordination matter more. Understanding these matchup dynamics is essential for champion select decisions and in-game strategy when facing this lane opponent.

Cassiopeia vs Illaoi Laning Phase Breakdown

Cassiopeia wins the laning phase against Illaoi in League of Legends

Cassiopeia is favored during the laning phase against Illaoi, winning 3 out of 5 key stat categories. Cassiopeia holds advantages in farming, gold income and crowd control, making them the stronger laner in this matchup.

Farming
6.6Cassiopeia
6.1Illaoi
Cassiopeia edges out Illaoi by 0.5 CS per minute — a moderate farming advantage that adds up to roughly 8 CS over a 15-minute laning phase. This translates to earlier component purchases and slightly faster power spikes for Cassiopeia.
Damage
1,025Cassiopeia
1,036Illaoi
Damage output is virtually even between Cassiopeia and Illaoi, with only 11 DMG/min separating them. Fights in this matchup are decided more by ability timing and positioning than raw damage numbers, making mechanical skill the deciding factor in trades.
Economy
13,529Cassiopeia
12,763Illaoi
Cassiopeia earns 766 more gold per game than Illaoi, equivalent to roughly one additional component item. This economic edge comes from a combination of better farming, kill participation, and objective control, giving Cassiopeia slightly faster item completions.
Utility
1.3Cassiopeia
0.3Illaoi
Cassiopeia brings significantly more crowd control than Illaoi, with 1.0 more seconds of CC per minute. This large utility gap makes Cassiopeia far more valuable in setting up jungle ganks, controlling objectives, and locking down targets in team fights. Illaoi should invest in tenacity and position carefully to avoid being chain-CC'd.
Sustain
1,061Cassiopeia
1,965Illaoi
Illaoi vastly out-sustains Cassiopeia, healing and mitigating 904 more damage per minute. This massive durability gap means Illaoi can absorb significant punishment and remain in lane while Cassiopeia is forced to recall. Building grievous wounds early is essential for Cassiopeia, and focusing on burst trade patterns rather than sustained fights is critical.

Best Cassiopeia Build Against Illaoi

Sorcerer's Shoes is the optimal boots choice against Illaoi, providing the mobility and stats Cassiopeia needs most in this matchup. The top-performing core items for Cassiopeia against Illaoi are Rod of Ages, Liandry's Torment and Rylai's Crystal Scepter. This combination gives Cassiopeia an effective balance of damage, survivability, and utility for the matchup. This build performs exceptionally well, achieving a 100.0% win rate across 2 games — well above average and making it the top item path against Illaoi. Adjustments may be needed based on team compositions and game state, but this build provides the strongest foundation for the Cassiopeia vs Illaoi matchup.

Early Game vs Late Game

Early Game
Cassiopeia
50.0%
+0.0% advantage
Cassiopeia early game win rateCassiopeia50.0%
Illaoi early game win rateIllaoi50.0%
Late Game
Illaoi
60.0%
+20.0% advantage
Cassiopeia late game win rateCassiopeia40.0%
Illaoi late game win rateIllaoi60.0%

The early game (first 15 minutes) is a toss-up between Cassiopeia and Illaoi, with Cassiopeia holding a razor-thin 50.0% win rate edge (+0.0%). Individual skill and jungle proximity will matter more than champion advantage in the early laning phase.

Illaoi is far superior in the late game (25+ minutes), boasting a 60.0% win rate — 20.0 points above Cassiopeia. Extended games heavily favor Illaoi, whose kit and scaling make them a dominant force in team fights and objective control.

The power dynamics shift as the game progresses — Cassiopeia has the edge early, but Illaoi gradually takes over. However, the margins are slim enough that either champion can win at any stage with the right plays. Focus on taking advantages when you have them rather than waiting for a specific game phase.

Best Cassiopeia Runes Against Illaoi

Precision rune tree - Cassiopeia primary runes vs IllaoiPrecision
Conqueror - best Cassiopeia rune vs IllaoiPresence of Mind - best Cassiopeia rune vs IllaoiLegend: Haste - best Cassiopeia rune vs IllaoiLast Stand - best Cassiopeia rune vs Illaoi
Sorcery rune tree - Cassiopeia secondary runes vs IllaoiSorcery
Manaflow Band - best Cassiopeia rune vs IllaoiTranscendence - best Cassiopeia rune vs Illaoi
100.0% WR

The Precision and Sorcery rune setup gives Cassiopeia the best tools to compete against Illaoi in this difficult matchup, compensating for the statistical disadvantages with optimal rune synergies.


Cassiopeia matchup data for League of Legends patch 26.7. The table below shows Cassiopeia's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Cassiopeia build, runes, laning stats, and early vs late game analysis for that specific matchup.

Cassiopeia matchup win rates and stats in League of Legends patch 26.7
Opponent
Win Rate
Matches
CS/min
DMG/min
Gold/game
Early WR
Late WR
56.25%326.788512,08850.0%66.7%
55.17%297.082911,66350.0%60.0%
48.00%256.776712,31650.0%47.4%
47.83%236.872911,51240.0%62.5%
45.45%226.385913,06120.0%52.9%
59.09%226.484912,54862.5%57.1%
42.11%196.986411,12127.3%62.5%
42.11%196.590810,89433.3%57.1%
57.89%196.492112,99228.6%75.0%
41.18%176.373912,06537.5%44.4%
35.29%176.773611,49814.3%50.0%
58.82%177.076110,08961.5%50.0%
43.75%166.579312,56433.3%46.1%
37.50%166.679911,96633.3%40.0%
37.50%166.769211,33728.6%44.4%
66.67%156.194812,98175.0%63.6%
66.67%157.098013,675100.0%54.5%
50.00%146.580411,93333.3%62.5%
57.14%146.565011,06250.0%62.5%
21.43%146.485812,88566.7%9.1%
46.15%136.86919,86937.5%60.0%
69.23%136.494011,61866.7%71.4%
58.33%126.984013,60150.0%66.7%
66.67%126.91,01711,75950.0%83.3%
36.36%116.262311,14260.0%16.7%
81.82%116.894211,31971.4%100.0%
54.55%116.593013,22360.0%50.0%
63.64%117.46599,84555.6%100.0%
36.36%115.583012,70025.0%42.9%
45.45%116.71,09012,21225.0%57.1%
45.45%117.179011,95850.0%42.9%
40.00%106.483613,98333.3%42.9%
20.00%107.565811,9420.0%25.0%
77.78%97.093011,929100.0%60.0%
44.44%96.11,06214,147100.0%37.5%
33.33%96.374010,38820.0%50.0%
62.50%86.293212,07075.0%50.0%
50.00%86.584011,20660.0%33.3%
62.50%87.21,06913,95450.0%66.7%
37.50%87.375311,9870.0%60.0%
62.50%86.580412,10040.0%100.0%
71.43%76.71,07712,31650.0%80.0%
42.86%76.61,02513,52950.0%40.0%
57.14%76.282511,09066.7%50.0%
28.57%76.479313,23650.0%0.0%
85.71%77.097012,450100.0%75.0%
83.33%66.864110,21075.0%100.0%
33.33%66.575210,28925.0%50.0%
83.33%66.784013,44550.0%100.0%
33.33%66.875810,81125.0%50.0%
66.67%65.987214,875100.0%60.0%
16.67%66.155810,7760.0%50.0%
83.33%66.986213,632100.0%50.0%
60.00%57.190515,4910.0%75.0%
0.00%56.91,07312,4530.0%0.0%
60.00%57.31,07713,11466.7%50.0%
80.00%56.999912,801100.0%50.0%
40.00%56.783410,90933.3%50.0%
20.00%55.77549,53133.3%0.0%
80.00%57.079611,09275.0%100.0%
40.00%56.774513,361100.0%0.0%
80.00%57.26758,508100.0%50.0%
60.00%55.91,14416,9190.0%60.0%
60.00%56.77329,347100.0%0.0%
20.00%56.895411,16633.3%0.0%

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Cassiopeia vs Illaoi - Frequently Asked Questions

How does Cassiopeia do against Illaoi in League of Legends?

Illaoi wins the Cassiopeia vs Illaoi matchup with a 57.1% win rate compared to Cassiopeia's 42.9%, a 14.3 percentage point difference. This data is based on 7 recent ranked games in patch 26.7.

How does Cassiopeia do against Illaoi in the early game?

In the early game, Cassiopeia has the advantage against Illaoi with a 50.0% win rate versus 50.0%. Cassiopeia players should look to press their lane advantage through aggressive trades and wave control during the first 15 minutes.

How does Cassiopeia do against Illaoi in the late game?

In the late game, Illaoi takes over the Cassiopeia vs Illaoi matchup with a 60.0% win rate compared to 40.0%. Illaoi scales better into team fights and objective contests after 25 minutes.

Who wins the Cassiopeia vs Illaoi matchup?

Illaoi wins the matchup against Cassiopeia with a 57.1% win rate in League of Legends patch 26.7. The 14.3 percentage point advantage means Illaoi is significantly favored in this lane matchup based on 7 games analyzed.

What is the best Cassiopeia build against Illaoi?

The best Cassiopeia build against Illaoi includes Rod of Ages, Liandry's Torment, Rylai's Crystal Scepter with Sorcerer's Shoes. This build achieves a 100.0% win rate in the matchup. Check the matchup breakdown above for the full item path and build order.

What are the best Cassiopeia runes against Illaoi?

The best Cassiopeia runes against Illaoi use the Precision primary tree with Sorcery secondary. This rune setup achieves a 100.0% win rate in the Cassiopeia vs Illaoi matchup. See the full rune breakdown in the matchup comparison above.

Does Cassiopeia counter Illaoi?

No, Cassiopeia struggles against Illaoi with only a 42.9% win rate. Illaoi has the advantage in this matchup. Cassiopeia players should focus on safe farming and avoiding extended trades to minimize Illaoi's lead.

How do I play Cassiopeia against Illaoi?

When playing Cassiopeia against Illaoi, play cautiously and avoid Illaoi's power spikes. Look for jungle assistance and team-dependent plays since Illaoi has the statistical advantage at most stages. Use the matchup-specific build and runes above to optimize your chances.