Its all about experimentation and finding your own sound. That said, here is a good starting point if you want to hook together every Pigtronix pedal in a row:
Philsopher’s Tone –> Mothership –> Philosopher King –> Aria –> PolySaturator –> Disnortion –> Envelope Phaser –> Class A Boost –> Echolution –> Tremvelope
Of course, the Keymaster opens up many more possibilities for parallel mixing and FX loops that contain multiple effects in a chain.