Come on, only the Gjallarhorn-desperate would offer a Red Death and a SUROS for it. The use of that rocket launcher is strictly situational and limited by the availability of heavy ammo, while Red Death is incredible 24/7. I know which one I would rather have, and it isn't the noob tube. To answer your question, I would trade Gjallarhorn for Red Death in a heartbeat.

I use bad juju for everything then swap out for a scout rifle and pop my ghorn on for boss

Never

i have every exotic weapon in the game. i wouldn't trade my ghorn for all of them if i didn't have any of them