So, I'm new, and I've burned through 50 Doomguys so far. My 3 highest scores are all at the same level: Hell's Armory. How the hell do I beat the dual Shamblers? I've tried explosives in my first run (With a Napalm launcher, was before I found out they're resilient against explosions and invincible against liquids), a Survivalist specced Marine in the second (Ate through me like butter), and a Shottyhead (Almost, one more level and I could've picked it) Scout.
Can't even kill one of them, is there something in the chamber they spawn out of that I can use?
I'm on the medium difficulty, I think, Hey, Not Too Rough.