Use Jarvan IV's early level 2-3 gank threat to force flashes and snowball lanes before Vi can match tempo.
Prioritize river control and objective setups to leverage Jarvan IV's strong engage and objective control against Vi's similar but less reliable invade resistance.
Jungle Plan
Path toward lanes with crowd control or immobile carries to maximize gank success and force Vi onto the back foot.
Use early gank pressure and lane priority to secure first dragon or Rift Herald instead of full clears.
Track Vi's pathing to counter-gank or trap her with (R) during objective fights to deny smite and force numbers advantage.
Danger windows
Respect Vi's early invade potential around level 3 when (Q) is available to punish Jarvan IV's engage cooldowns.
Avoid isolated river fights without vision control, as Vi's lockdown and knockback can turn fights.
Be cautious contesting objectives if (E)+(Q) combo or (R) is on cooldown, as Vi can punish with superior dueling and lockdown.
Early game
Start with a path that enables a level 3 gank on an overextended or flashless lane to maximize early pressure.
Fight for first Scuttle only if nearby lanes have priority to avoid losing tempo to Vi's faster clear.
Avoid prolonged isolated fights early if (E)+(Q) is down to prevent being punished by Vi's strong dueling and lockdown.
Power spikes
At level 2-3, use (E)+(Q) to engage and force early summoners or kills, exploiting Jarvan IV's superior early gank threat.
At level 6, leverage (R) to lockdown immobile targets or trap Vi during objective fights for guaranteed picks.
Respect Vi's early strong dueling with (Q) and post-6 lockdown (R) by avoiding fights when these are up without lane support.
Win conditions
Convert early gank pressure into lane leads and use those advantages to secure dragons and Rift Herald.
Use (R) to trap Vi or her teammates during objective fights to deny smite and force committed engagements.
Maintain river vision and track Vi's pathing to counter-jungle safely and deny her scaling through jungle control.
Tip: For Jarvan IV vs Vi, read overview, trading pattern, and danger windows first for a fast Jungle lane check.
