Harpoon Mobile Bruiser Engineer Build

Bouncing Grenades · Spider Mines · Thermal Harpoons · TR58 Carbonizer Turret

Data from build 21587608, updated 23 Sep 2026

Survivor

Engineer

Fortification Expert

Engineer builds · switch build

Harpoon Mobile Bruiser

MediumMobilityProcBoss killer

TR58 Carbonizers follow you while Thermal Harpoons (500% each) and Spider Mines (600%) do the big hits. Both clear the 400% line for Runald's and Kjaro's Bands, but each Band recharges only every 10 seconds. Turret shots are far below 400% and never trigger them.

Loadout

PrimaryM1Bouncing Grenades
SecondaryM2Spider Mines
UtilityShiftThermal Harpoons
SpecialRTR58 Carbonizer Turret

Equipment

Royal CapacitorRoyal Capacitor adds a 3000% opener for the boss. Turrets can't use equipment, so it's your button.

Why the core items

Hardlight AfterburnerHardlight Afterburner adds two Harpoon charges and trims the cooldown by a third.
BandolierKills can drop a pack that resets Harpoons and refreshes the turret cooldown.
Runald's BandA 500% Harpoon trips Runald's Band for a slow and a blast.
Kjaro's BandKjaro's Band uses the same trigger and adds a burning tornado.

How to play it

Sweep the crosshair across targets in painting mode. Moving the reticle onto a new enemy resets the lock-on delay.
Lysate Cell lets you field a third TR58. A second Lysate adds nothing, so one is enough.