Depends what pre as all my basses have different makes.
First off I get the amp pretty neutral. A load of prep work goes into this because I choose from 4 gig rosta basses.
Once I've selected my basses for the gig, I dont touch EQ and just dial in gain and Master to suit.
I might vary amps and cabs but I know where I am with them soundwise. I've worked this previously.
On the gig, Im looking for onboard to play to the room so I might just dial a bit on
Tone and eq of mids, T&B.
Im never far off but some sounds in a room speak better than others.
If i use the bridge pickup bias, i tend to keep the neck in there for depth so never 100% bridge
I might adjust the bass pot on the pre to suit as typically the bridge bias loses a bit of projection or volume.
The last thing you want is to be lost in knob twiddling.
I do mine mid song so you need to go to it instantly.