A 9 string in the hands of Josh Travis is like Mjölnir in Thor's hands. It's easily going to annihilate anything within hearing distance. That nasty tone sounds even better here than on the record imo. His groove is unmistakable and iconic.
Yo, man. Try using Boss CS3 pedal (or digital analog of it) in the front of the amp (but don't get too high with the gain on the amp). It should help a lot. This pedal is a milestone, way better than Fortin33 and various boosters/tubescreamers. I assure you, if you figure out how to use it, your 9th will be chuggin' as hell.