Stoner Doom?
Who cares? The crowd is all gonna be stoned, you could take a broom and air guitar and make bass noises with your mouth and they'd think you were God....and even if they did know, they will be too depressed about their miserable lives that they won't have time to worry...
Seriously though, why not try heavier gauge flat wounds? Are you looking for a deep low thud, or a more metal sounding zing?