Sion is a B tier Mid Lane champion in League of Legends Patch 16.5 with a 53.2% win rate in Emerald+ ranked games, according to OP.GG data. The optimal Sion build starts with Doran's Shield and Health Potion, with core items being Sunfire Aegis, Thornmail, Spirit Visage and Plated Steelcaps. For runes, run Grasp of the Undying from Resolve with Inspiration as the secondary tree. Skill priority is Q > W > E. Sion is best played with Flash and Teleport as summoner spells. The most challenging matchup in Mid Lane is Diana (S+ tier, 53.4% win rate).
Source: OP.GG Emerald+ ranked data, Patch 16.5 · Last updated: March 2026 · Meridian Zero Analytics
Best Build — Patch 16.5
Start
Doran's ShieldHealth Potion
Core
Sunfire AegisThornmailSpirit Visage
Boots
Plated Steelcaps
Spells
FlashTeleport
Priority
Q > W > E
Expert Tips
- Decimating Smash (Q) does 300% damage when fully charged. Always complete the charge animation before releasing.
- Glory in Death (passive) — when you die you have 8 seconds as an undead. Save ult charges for this phase.
- Unstoppable Onslaught (R) charge distance is long — use it to initiate fights from outside vision range.
Mid Lane Matchups — Difficulty by Opponent
| Opponent | Tier | Difficulty | |
|---|---|---|---|
Diana
|
S+ | Hard | Analyze → |
Ahri
|
S+ | Hard | Analyze → |
Zed
|
S+ | Hard | Analyze → |
Vex
|
S | Hard | Analyze → |
Fizz
|
S | Hard | Analyze → |
Zoe
|
S | Hard | Analyze → |
Aurelion Sol
|
S | Hard | Analyze → |
Twisted Fate
|
S | Hard | Analyze → |
Xerath
|
S | Hard | Analyze → |
Katarina
|
S | Hard | Analyze → |
Mel
|
S | Hard | Analyze → |
Sylas
|
S | Hard | Analyze → |
Runes — Patch 16.5
KeystoneGrasp of the Undying
Primary TreeResolve
Slot 1Shield Bash
Slot 2Conditioning
Slot 3Overgrowth
Secondary TreeInspiration
Secondary 1Biscuit Delivery
Secondary 2Cosmic Insight