LoL Arena | Vulnerability Augment is S+ tier.

Vulnerability synergizes extremely well with the Energize items, since most of them give crit on top of their item damage effect. Additionally, Ezreal is one of the best users of the build by having a long-ranged activator with his Q and a low cooldown blink that builds Energize up quickly-on top of Arena's doubled Energize gain.
also oops my mic was recording to an empty track so no voice from me
also shout out to my galio friend legit best support I've ever played with
My Augments this game, from top left to bottom right:
Vulnerability (Silver): Damage dealt by items and damage over time effects can now critically strike for 50% bonus damage. Additionally, gain 20% critical strike chance. [Legit S-tier silver augment btw.]
Shrink Ray (Gold): Basic attacks reduce the target's damage dealt by 15% for 3 seconds, refreshing with each hit. Their size is also reduced significantly for the duration. [In retrospect, not that good, since while it gets applied by Ezreal Q, it also makes them harder to hit with further Ezreal Qs.]
Outlaw's Grit (Gold): Casting an ability with a Dash or Blink grants 12 bonus armor and bonus magic resistance, stacking up to 5 times for a total of 60 bonus resistances. This effect lasts indefinitely until the end of the round.
Ethereal Weapon (Gold): Your abilities apply on-hit effects at 100% effectiveness (1 second cooldown per target). [This can proc Energize effects.]

[@owen551]

All your opponents seem amazingly content to hit galio over ezreal! I only play summoner's rift so I don't know the intricacies of arena, but I think they'd have a lot more success simply walking past him to you!