This is the build I personally use most of the time. However, the build depends on the map and gamemode, when there's wall, you use breakthrough gadget, on open maps without walls use the other one. The gears I would not change, nor the star power.

Breakthrough
Stu's next Super can bash through obstacles, making debris fly forward. Each piece of debris deals 216 damage to any opponent it hits.

Gaso-Heal
Using his Nitro Boost Super restores 512 of Stu's health.

Damage
Deal 15% extra Damage when your Brawler is below 50% Health.

Speed
Gain 15% Speed increase when moving in bushes.
Guide
With this build you can play aggressively, but not all of the time. You can use this build to escape from tight situations.
Game Modes

Brawl Ball
Break the enemy walls to score more easier. With one shot you fill up your super so you can dash with the ball, also you can do some trickshots (if necessary)

Gem Grab
Dash with your super to pick up the gems, you can also dodge the opponents attack with the super when you have the gems and you can break the walls with the gadget to kill someone and take the gems.

Basket Brawl
I don't really know any good tips for this mode, but stu is very good on this mode overall.
About This Build
This build, Stu build I use (most of the times), was created by FightingBarbarian712484 on Mar 22, 2025. The build is for the Brawler, Stu, and uses the Breakthrough gadget, Gaso-Heal star power, Damage gear, and Speed gear. To see more, you can go here to view the best Stu build and others.
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