For Phish you'll want to use overdrive, compression/sustain, wah, delay/echo, flanger, octave, and any loops might be helpful (of course not all of these at once). For the Dead, you can pretty much run the gamut on FX, but especially an envelope filter/auto wah, a little overdrive or distortion maybe, and certainly delay/echo, among others. Don't play much ABB, so can't say there.
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"We must embrace pain and burn it as fuel for our journey" - Japanese poet Kenji Miyazawa