Hmm, my Plethora X5 came with 600mA power supply. I suppose you have to consider what you really need in terms of effects. I remember Robben Ford saying in an interview that all he really needed was some reverb and a bit of delay, though now he has a new pedalboard courtesy of Dan from That Pedal Show. This made me consider what I really need - reverb, delay, chorus, tremolo and a Univibe-type thing. Pitch-changer and/or octaver is nice but not essential.
Consequently my main "board" on the Plethora is Viscous Vibe > Corona Chorus > Pipeline Tremolo > Flashback 2 Delay > Hall of Fame 2 Reverb. All of these are in the effects loop of the amp, and I'd be unlikely to use all of them at once. The MASH footswitches are useful, e.g. for changing the speed of the Viscous Vibe.
It's fun to have a chorus into a delay into a reverse delay into a reverb into a looper, but that's not something I'd use on a gig 🙂