I'm really enjoying learning how to use all this stuff at the moment.
To my novice ears at least, things seem to work best with pitchshift/octave functions first as they seem to work best with a cleaner signal.
Dirt needs to come before filter otherwise you miss all of the resonance in the filter sweep, the dirt is also less effective if the filter has taken the highs out.
That puts dirt in the middle by definition.
I'm putting reverb after filter as a kinda 'catch all'. Tbh though I tend to use this separately anyway so it's a zero sum game.
I have found that using the effects in combination this way has highlighted how different and influential the octave sound can be. Previously using this as a stand alone voice they all seemed quite similar, impact is very different in conjunction with the other effects.
Wholehearted endorse experimentation though. Whilst this works for me and seems generally accepted wisdom I believe 100% that the whole point of this stuff as a creative plaftorm is to augment your own musical voice, whatever that might be.