I've always wanted to build up a bass rig. To start, I'd have a tuner, a good compressor (Barber Tone Press comes to mind), a TRex Bass Juice for OD, and one of those little purple MXR envelope filters.
I don't think you need both a compressor and a dirt pedal. its nice to have both, but not mandatory. what style do you play? if you need cleans or play slapbass ya choose the compressor over a dirt pedal. my tech 21 mimics characteristics of a tube amp which is pretty cool.
some of my amps have good EQs so I do not feel it is mandatory, but they are nice for fine tuning in a band setting.
I mostly play metal and rock. though a dirt pedal is nice, a compressor really improves my tone since I don't have a good bass.
also my amp's eq is pretty good but I'm setting up for usability anywhere
they tune once before they play, and then just plug in to the amp
I love using my pedal tuner, my vtbass, decimator gstring noisegate for heavy music! not necessary though. for heavy rock a lot of times they just step on the pedal to stop the noise instead of using a noisegate.
theres no right answer, but I am a tweaker so ya for me more options are better
I would prolly never use the compressor though since distortion is compression, in a general sense. I have both but dont like using them together. when I mix songs I use compression plugin after I record the bassline.
Sparkle Drive, Juggernaut Rat, Pork Loin are all OD pedals with clean mix knobs, some other options are the Ibanez TS9B, & Boss ODB-3.
The clean mix lets you add some grit without loosing all the lows.
Taurus Pedals are their own thing.