Ha Ha, I get that a lot. I used to play in a death core band (death metal but played by chavs) and all I used was the Master Blaster as a boost for tapping and solo passages. But my new band's very Elbow/Mogwai/EITS kind of stuff so I use reverb effects A LOT! Crank up the decay time and used in conjunction with a volume pedal, you can get some pretty amazing swelling effects.
When I used to have a fretless, a tiny bit of reverb would create a very convincing double bass sound.
Truckstop