Quick answers
Who counters Vex in Wild Rift?
In the matchup data documented in Rift Lab, these are the harder matchups for Vex: Syndra (Mid), Orianna (Mid), Lux (Support), Ziggs (Mid), Galio (Mid), Kassadin (Mid), Annie (Support), Lissandra (Mid). This is a documented matchup list, not a win rate: TheNexus does not publish win-rate or pick-rate figures it cannot source.
How do you play against Vex in Wild Rift?
Riot's ability text for Vex describes a dash, leap or blink in SHADOW SURGE (ultimate); a shield in PERSONAL SPACE (ability 2). Plan around those abilities before a trade or a fight. These notes are keyword matches over the ability text only, not a rating of how strong Vex is, so read the full descriptions on this page.
What is the best build for Vex in Wild Rift?
The Nexus-reviewed core build for Vex, in purchase order: Luden's Echo then Stormsurge then Infinity Orb then Boots of Mana. Runes: Electrocute, Cheap Shot, Chain Assault, Eyeball Collector, Bone Plating. Situational swaps: against enemy shields: Oceanid's Trident; against enemy crowd control: Banshee's Veil. This is a reviewed snapshot (patch 7.2b), not a build ranked by win rate.
Which lane and role does Vex play in Wild Rift?
Vex is a Mage by Riot's classification and is played in Mid. Riot rates the difficulty Low. On our tier-list snapshot (patch 7.2b) it shows A tier from its external source, which is a snapshot letter and not a TheNexus win rate.
Every answer here is built from Rift Lab data and Riot's own ability text. Where the data is missing we say so instead of guessing.