Trundle thrives in extended duels and objective fights where he can stat-check Briar and deny her mobility advantage.
Prioritize river control and contest Scuttle when your lanes have priority to limit Briar's early skirmish potential.
Jungle Plan
Full clear efficiently then prioritize Scuttle contest when nearby lanes can move first to secure river vision and objective control.
Invade Briar's jungle camps only when your lanes have priority and you can trap her with (E) for easy picks.
Use (E) to block Briar's escape during counter-jungling and force fights in your (W) domain to maximize your sustain and damage.
Danger windows
Beware of Briar's early invade attempts when she has lane priority and can follow up with (Q) stun and (R) fear for sticky engages.
Avoid isolated river fights without vision as Briar's high mobility and crowd control can force unfavorable skirmishes.
Be cautious during your (W) downtime or after using (E), as your chase and control drop, increasing vulnerability to Briar's burst and disengage.
Early game
Start with a path that leads to early river presence to contest Scuttle Crab and leverage your high early dueling power.
Avoid isolated fights early since Briar's high mobility and crowd control can punish overextensions.
Track Briar's pathing to set up counter-ganks where your (E) pillar can trap her or cut off escape routes.
Power spikes
Level 6 (R) drastically improves dueling by stealing Briar's resistances and health, making her vulnerable to extended fights; use it on her or other durable targets before committing.
First completed dueling item enhances your sustained damage and tower pressure, enabling stronger side-lane trades and objective sieges.
Maintain fights inside (W) to maximize healing and attack speed, tipping skirmishes in your favor against Briar's burst and mobility.
Win conditions
Convert early river control and Scuttle dominance into dragon and Rift Herald setups to build map pressure.
Use (E) pillar to trap Briar in extended duels inside your (W), then apply (R) on her or frontline tanks to drain resistances and secure kills.
Leverage your strong dueling and objective control to deny Briar's scaling by forcing fights on your terms and pressuring side lanes for tower damage.
Tip: For Trundle vs Briar, read overview, trading pattern, and danger windows first for a fast Jungle lane check.