Best Sion Mid Synergies

Compare Sion Mid strongest and weakest synergies by duo win rate, expected win rate, delta, sample size, and allied role for team comp planning.

Updated 2026-09-20. Data is current for LoL patch 26.18 (all regions, low elo and high elo).

How these matchup statistics are calculated

Counter and synergy statistics use Ranked Solo/Duo games, exclude matches shorter than 600 seconds, and group results by patch window, region, rank scope, and champion role.

Pairwise pages use a rolling three-patch window and compare observed win rate with a log-odds expected win rate based on each champion's role-adjusted baseline; listed pairs require at least 500 games.

Read the full methodology for the model and guidance on interpreting these results.

Summary

Low Elo data lists Ezreal ADC, Seraphine Support, Thresh Support, Jinx ADC, Jhin ADC, and Caitlyn ADC as the strongest synergy partners for Sion Mid. The weakest listed synergies for Sion Mid are Kai'Sa ADC and Lux Support. The detailed info below lists each partner with observed win rate, expected win rate delta, sample size, rank scope, and patch window.

Detailed info:

Top 6 Low Elo Sion Mid all-role strongest synergies

  1. Ezreal ADC - Low Elo data: Sion Mid vs Ezreal ADC, 49.4% observed win rate, +2.4 percentage points vs expected, 536 games, 3-patch window 26.16-26.18.
  2. Seraphine Support - Low Elo data: Sion Mid vs Seraphine Support, 53.8% observed win rate, +1.8 percentage points vs expected, 500 games, 3-patch window 26.16-26.18.
  3. Thresh Support - Low Elo data: Sion Mid vs Thresh Support, 53.4% observed win rate, +1.5 percentage points vs expected, 552 games, 3-patch window 26.16-26.18.
  4. Jinx ADC - Low Elo data: Sion Mid vs Jinx ADC, 53.4% observed win rate, +0.2 percentage points vs expected, 697 games, 3-patch window 26.16-26.18.
  5. Jhin ADC - Low Elo data: Sion Mid vs Jhin ADC, 50.5% observed win rate, +0.1 percentage points vs expected, 709 games, 3-patch window 26.16-26.18.
  6. Caitlyn ADC - Low Elo data: Sion Mid vs Caitlyn ADC, 50.4% observed win rate, +0.0 percentage points vs expected, 855 games, 3-patch window 26.16-26.18.

Top 2 Low Elo Sion Mid all-role weakest synergies

  1. Kai'Sa ADC - Low Elo data: Sion Mid vs Kai'Sa ADC, 47.0% observed win rate, -3.4 percentage points vs expected, 925 games, 3-patch window 26.16-26.18.
  2. Lux Support - Low Elo data: Sion Mid vs Lux Support, 50.5% observed win rate, -0.1 percentage points vs expected, 665 games, 3-patch window 26.16-26.18.

Top 1 High Elo Sion Mid all-role weakest synergies

  1. Kai'Sa ADC - High Elo data: Sion Mid vs Kai'Sa ADC, 47.7% observed win rate, -0.6 percentage points vs expected, 572 games, 3-patch window 26.16-26.18.