MacroMind matchup data: real ranked games, not opinions
Cassiopeia vs Jax
What is Cassiopeia's win rate vs Jax?
In Top, Cassiopeia wins 54% against Jax across 179 observed ranked games.
Global ranked sample: games from every region and every rank pooled together, not one server's stats. Data runs through patch 26.12; curves updated 2026-08-07.
By 15 minutes the median game has Cassiopeia ahead by 860 gold.
Cassiopeia at 15:00
- Gold: +860
- CS: +28
- XP: +1,048
Typical gap to Jax, from 178 games that reached 15:00.
Does Cassiopeia counter Jax?
Too close to call. Cassiopeia sits at 54% over 179 games, so neither pick counters the other here. The lane goes to whoever wins the spots below, like the gold lead at 10:00 or staying alive until 15:00, so play for those and let the pick argument go.
How to beat Jax as Cassiopeia
When Cassiopeia is ahead in gold at 10:00, this matchup runs 57% over 127 games; behind, it drops to 48% over 52.
| The spot | Win rate | Games |
|---|---|---|
| Ahead in gold at 10:00 | 57% | 127 |
| Behind in gold at 10:00 | 48% | 52 |
| First blood | 59% | 96 |
| +kills at 10:00 | 54% | 99 |
| +CS at 10:00 | 56% | 140 |
The median first death in this lane comes at 4:18; the level 6 spike lands around 5:33. Respect the all-in window until your spike is online.
What does Cassiopeia build in Top?
Into Jax specifically, Cassiopeia finishes Rod of Ages first most often: 50.0% over 56 games of this matchup.
The most-finished Cassiopeia core is Rod of Ages, Archangel's Staff, Rylai's Crystal Scepter: 57.0% across 892 games when all three got done. All matchups, patches 26.1-26.12.
Most games start Doran's Ring + Health Potion + Health Potion; the first finished item is usually Rod of Ages (1,920 games).
Skill plan: Cassiopeia players max E first and take E at level 1.