Sion vs Galio

Not enough games

Strong engageHeavy AP damageHeavy CCVery tanky

Build vs Galio

The champion's reference build, for lack of enough games in this matchup

Starting items

—

Core build

1—

2—

3—

Standard

4vs Slow

5—

Summoner spells

100%

Anti CC

4vs CC

Other options

—

Sorcery

Stormraider's Surge

Manaflow Band

Absolute Focus

Gathering Storm

Resolve

Conditioning

Demolish

Strength by game phase

Passive, spells and ultimate

Colossal Smash (P)

Every few seconds, Galio's next basic attack deals bonus magic damage in an area.

Cooldowns by spell rank

Level	Q	W	E	R
3	11s	18s	11s	–
6	9s	18s	11s	3m
9	7s	17s	11s	3m
11	7s	16s	11s	2m40
16	7s	14s	9s	2m20
18	7s	14s	7s	2m20

Tips to maximize your impact

Last-hit everything for max health
Last-hit minions and monsters for Soul Furnace (W): each kill permanently gives you max health, more on champions, large minions and large monsters.
Slow before your Smash
Slow your target with Roar of the Slayer (E) before charging Decimating Smash (Q): they're less likely to get out of the area.
Charge your Smash for at least 1 second
Charge Decimating Smash (Q) for at least 1 second: below that, the hit only slows, and beyond it, the knock-up and stun last longer the more you charge.
Keep hitting after you die
After you die, hit the nearest champion: during Glory in Death (passive), your autos are much faster, heal you and deal damage based on their max health.
Engage or roam from far away
Cast Unstoppable Onslaught (R) from far away to engage or roam: unstoppable for 8 seconds, you stun longer and hit harder after a long charge.

How to counter and exploit weaknesses

Trade after his E
Take a trade after Justice Punch (E): it's his only dash, on an 11 to 7 second cooldown.
Lean on physical damage
If you deal physical damage, lean on it in trades: the passive shield of Shield of Durand (W) only absorbs magic damage.
Leave his taunt area
Leave the area while he charges Shield of Durand (W): the longer he charges, the longer and wider the taunt.
Check where he is before a dive
Before diving one of his allies, check where Galio is: Hero's Entrance (R) flies him in from long range to an allied champion, and his landing is a knock-up.

Patch 16.21.1