Top augment choices for Sion include Heavy Hitter (Silver), Tank Engine (Gold), Goliath (Prismatic).
Overall
Goliath
GoliathBecome large, gaining @HealthAmp*100@% Health and @AFAmp*100@% Adaptive Force.
Tier: S+
Pick %: 30%
Tank Engine
Tank EngineGain increased size and percent bonus Health per takedown.
Tier: S+
Pick %: 25%
Heavy Hitter
Heavy HitterYour Attacks deal additional physical damage equal to @HealthPercent*100@% of your max Health.
Tier: S+
Pick %: 20%
Silver
Heavy Hitter
Heavy HitterYour Attacks deal additional physical damage equal to @HealthPercent*100@% of your max Health.
Tier: S+
Pick %: 20%
Clothesline
ClotheslineThere is a tether connecting your team, deals constant magic damage to enemies it touches.
Tier: S+
Pick %: 9%
Desecrator
DesecratorImmobilizing enemy champions grants you permanent Cursed Power. Gain Armor and Magic Resistance based on your Cursed Power.
Tier: S+
Pick %: 6%
Gold
Tank Engine
Tank EngineGain increased size and percent bonus Health per takedown.
Tier: S+
Pick %: 25%
Quest: Steel Your Heart
Quest: Steel Your HeartRequirement: Possess Heartsteel with @StackThreshold@+ stacks. Reward: Multiply your Heartsteel stacks by @StackMultiplication@. Increase your Health Regeneration by @StacktoRegenConversion*100@% of your Heartsteel stacks.
Tier: S+
Pick %: 18%
Celestial Body
Celestial BodyGain @Health@ Health, but you deal @DamageReduction*100@% less damage.
Tier: S+
Pick %: 16%
Prismatic
Goliath
GoliathBecome large, gaining @HealthAmp*100@% Health and @AFAmp*100@% Adaptive Force.
Tier: S+
Pick %: 30%
Dreadbringer
DreadbringerGain an aura that continuously harvests permanent Cursed Power per enemy champion inside. Gain max Health based on your Cursed Power.
Tier: S+
Pick %: 15%
Center of the Universe
Center of the UniverseStars orbit you, dealing magic damage to enemies they pass through.