Best Sion Synergies

The best partner with Sion is Jhin ADC. The pair wins 51.4% across 1,156 games, 1.2 points more than the two champions' own win rates predict. Master Yi Jungle (+0.6 over 5,229 games) and Rengar Jungle (+0.6 over 1,750 games) also over-perform. Yone Top has the highest raw win rate (56.5%) among well-sampled pairs, but that is about what its own strength predicts (51.3% expected). Based on Low Elo Ranked Solo/Duo games, patches 26.20-26.22. These are observed associations, not guaranteed outcomes. The weakest listed synergies for Sion are Zyra Jungle, FiddleSticks Jungle, Rammus Jungle, Evelynn Jungle, Cho'Gath Jungle, Sejuani Jungle, Amumu Jungle, Vex Mid, Lillia Jungle, and Ekko Jungle. The detailed info below lists each partner with observed win rate, expected win rate delta, sample size, rank scope, and patch window.

Updated 2026-11-15. Data is current for LoL patch 26.22 (all regions, low elo and high elo).

Top 10 Low Elo Sion strongest synergies

  1. Jhin ADC - 51.4% win rate with Sion Support (+1.2 points vs expected), 1,156 games.
  2. Master Yi Jungle - 52.7% win rate with Sion Top (+0.6 points vs expected), 5,229 games.
  3. Rengar Jungle - 47.8% win rate with Sion Top (+0.6 points vs expected), 1,750 games.
  4. Briar Jungle - 55.6% win rate with Sion Top (+0.6 points vs expected), 3,308 games.
  5. Tahm Kench Support - 55.3% win rate with Sion Top (+0.6 points vs expected), 1,764 games.
  6. Yone Top - 56.5% win rate with Sion Mid (+0.5 points vs expected), 1,310 games.
  7. Bel'Veth Jungle - 53.6% win rate with Sion Top (+0.5 points vs expected), 1,822 games.
  8. Yasuo Mid - 51.9% win rate with Sion Top (+0.4 points vs expected), 5,315 games.
  9. Viego Jungle - 52.1% win rate with Sion Top (+0.4 points vs expected), 5,024 games.
  10. Graves Jungle - 51.0% win rate with Sion Top (+0.4 points vs expected), 3,505 games.

Top 10 Low Elo Sion weakest synergies

  1. Zyra Jungle - 54.2% win rate with Sion Top (-0.8 points vs expected), 1,270 games.
  2. FiddleSticks Jungle - 50.7% win rate with Sion Top (-0.8 points vs expected), 1,174 games.
  3. Rammus Jungle - 52.0% win rate with Sion Top (-0.6 points vs expected), 1,147 games.
  4. Evelynn Jungle - 52.2% win rate with Sion Top (-0.5 points vs expected), 2,020 games.
  5. Cho'Gath Jungle - 52.8% win rate with Sion Top (-0.5 points vs expected), 3,497 games.
  6. Sejuani Jungle - 54.2% win rate with Sion Top (-0.5 points vs expected), 1,004 games.
  7. Amumu Jungle - 52.0% win rate with Sion Top (-0.5 points vs expected), 1,736 games.
  8. Vex Mid - 50.2% win rate with Sion Top (-0.4 points vs expected), 2,555 games.
  9. Lillia Jungle - 54.6% win rate with Sion Top (-0.4 points vs expected), 3,973 games.
  10. Ekko Jungle - 50.8% win rate with Sion Top (-0.4 points vs expected), 2,352 games.

Top 10 High Elo Sion strongest synergies

  1. Pyke Support - 52.4% win rate with Sion Top (+1.4 points vs expected), 2,439 games.
  2. Nautilus Support - 51.2% win rate with Sion Top (+1.3 points vs expected), 4,378 games.
  3. Senna Support - 55.3% win rate with Sion Top (+1.0 points vs expected), 2,383 games.
  4. Thresh Support - 52.7% win rate with Sion Top (+0.9 points vs expected), 6,073 games.
  5. Braum Support - 51.3% win rate with Sion Top (+0.8 points vs expected), 2,208 games.
  6. Alistar Support - 53.6% win rate with Sion Top (+0.7 points vs expected), 2,709 games.
  7. Xerath Mid - 55.2% win rate with Sion Top (+0.6 points vs expected), 1,698 games.
  8. Rengar Jungle - 50.7% win rate with Sion Top (+0.6 points vs expected), 1,860 games.
  9. Yone Mid - 52.0% win rate with Sion Top (+0.6 points vs expected), 2,808 games.
  10. Master Yi Jungle - 51.7% win rate with Sion Top (+0.6 points vs expected), 2,190 games.

Top 10 High Elo Sion weakest synergies

  1. Seraphine Support - 49.8% win rate with Sion Top (-1.5 points vs expected), 2,634 games.
  2. Lux Support - 46.7% win rate with Sion Top (-1.2 points vs expected), 1,913 games.
  3. Lulu Support - 48.6% win rate with Sion Top (-1.0 points vs expected), 6,297 games.
  4. Renata Glasc Support - 47.4% win rate with Sion Top (-0.9 points vs expected), 1,085 games.
  5. Sona Support - 49.9% win rate with Sion Top (-0.7 points vs expected), 1,362 games.
  6. Rell Support - 49.8% win rate with Sion Top (-0.7 points vs expected), 1,944 games.
  7. Syndra Mid - 48.6% win rate with Sion Top (-0.6 points vs expected), 4,005 games.
  8. Nami Support - 50.2% win rate with Sion Top (-0.6 points vs expected), 3,948 games.
  9. Cho'Gath Jungle - 48.7% win rate with Sion Top (-0.6 points vs expected), 1,847 games.
  10. Soraka Support - 50.3% win rate with Sion Top (-0.5 points vs expected), 2,025 games.

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 1,000 games.

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