How to win lane as Jayce against Sion · 45.53% win rate (4,230 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
He tanks your poke and farms freely under tower, out-scaling your chip. Shove and roam instead of dueling.
Track: Sion's Q — Decimating Smash (10–6s cooldown). Charged = knockup. Dodge it.
Read from Jayce's seat: which stage windows this plan plays for against Sion.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Jayce | You take Cannon Q at level 1 and out-range his last-hits with the gate-poke — Sion has no shield and no gap-closer to answer, so you own the level. |
| Level 2 | Jayce | Adding Acceleration Gate turns Shock Blast into a full-range accelerated orb; he has to walk into it to farm and eats the Armor/MR shred on the Hammer swap. |
| Level 3 | Jayce | This is your hardest-favor window — the gate-Q chunks every step-up and you can interrupt a charging Decimating Smash with Thundering Blow before he has tank items to fight back. |
| Levels 4-5 | Sion | Soul Furnace comes online: a 15s W shield eats your gate-Q on demand, and Roar of the Slayer punts a minion back through you for a slow and armor shred. |
| Level 6 | Sion | His Unstoppable Onslaught is a genuine level-6 engage that charges across the lane and knocks you up, while your R is only the Cannon/Hammer stance swap — the window flips to him. |
| First item | Sion | With his first tank item and shield up he eats the orb, farms in his zombie passive, and starts out-trading the poke that defined your lead. |
| Two+ items | Sion | By two items a tanky Sion frontlines through your poke and a charged Q knockup into Onslaught deletes your defenseless frame — he hard out-scales you, so the lane is his. |
Levels 1-3 are your whole window, so abuse them: take Cannon Q, drop Acceleration Gate, and fire Shock Blast through it at every step-up Sion makes to last-hit. The accelerated gate-Q out-ranges his walk-up and the Cannon-to-Hammer swap shreds his Armor and MR for a free chunk. He has no Soul Furnace shield yet, so build a health lead and pressure plates — but his reach is Roar of the Slayer punting a minion back through you for a slow and armor shred. The other thing to respect is a fully charged Decimating Smash; if he winds it up, sidestep it and keep poking.
Pooled Emerald+ win rates from Jayce's side, sampled July 2026.
The full Jayce vs Sion report continues with the mid-game plan, the late-game and teamfight plan, every power spike to play around, and the win conditions for both sides — plus cooldown tracking and the live enemy-jungle tracker inside the app.
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Sion, slightly — Jayce wins 45.53% of 4,230 games; winnable with the right plan.
Mostly — Sion has a small statistical edge (54.47% win rate), but execution decides this lane far more than the pick does.
No — if anything Sion has the slight edge (Jayce wins 45.53%), though it stays close.
Jayce takes Conqueror on the Precision tree with Triumph, Legend: Alacrity and Last Stand, and Resolve secondary (Bone Plating and Unflinching) vs Sion.
Start Doran's Blade + Health Potion and back for Executioner's Calling (≈800g) — cuts his healing. Build Eclipse (poke + dive burst) first, then Serylda's Grudge, with Plated Steelcaps.
Playing the other side? Sion vs Jayce guide →
All Jayce top lane matchups →
More Jayce top lane matchups: vs Sett · vs Shen · vs Singed · vs Swain · vs Sylas · vs Tahm Kench