The main trick is get the cab off the floor, I find casters work well, you may get less resonant bass around the amp but as that is energy getting absorbed, lifting the cab, even on a crate throws more down the room than around it.
Other than this, keyboard player's are usually moaning knobs that think bass players are not real musco's .
Only had one scrap in a band, well I call it a scrap, ended with the keyboard player outside by the throat and in the canal to cool his mouth off
Every gig he would mouth off, turning a blind eye made it worse until one day he decided to throw his drink over me for been too loud on a stage about the size of a stamp, as the bass was not allowed through the PA, you do have to be heard...
Anyway, got the sack, but watching him swim was worth it.