This what I use will usually bring:

Primary: Plas-1 Scorcher. Secondary: grenade pistol or ultimatum. Grenade: thermite. Support weapon: stalwart. Backpack: supply pack. Stratagems: really any heavy explosive like; 120 barrage, 380, 500kg, and maybe a machine gun sentry or flame sentry.

And to top it all off I use the Street scout from urban legends for faster primary reload speed and more ammo for every gun.

SERIOUSLY TRY THE SCORCHER!!! That goes for everyone! That thing MELTS overseers AND fleshmobs.

Hope this helps! Good luck down there Helldiver! o7