Pedals that stack with the MXR M120 Auto Q Wah

Wren and Cuff Box of War Small Foot Fuzz

Wren and Cuff Box of War Small Foot Fuzz stacks high gain on top of the mid-forward already here

Wren and Cuff Box of War OG

Put Wren and Cuff Box of War OG in front and the mid-forward tone leans further toward fuzzy

EarthQuaker Devices Afterneath

EarthQuaker Devices Afterneath's ambient voice goes after MXR M120 Auto Q Wah in the signal chain — it's not there to compete with MXR M120 Auto Q Wah's own mid-forward character — goes in the amp's FX loop (or last, into a clean amp)

Boss DD-2 Digital Delay

Run Boss DD-2 Digital Delay after MXR M120 Auto Q Wah in the signal chain, clear of MXR M120 Auto Q Wah's own gain stage — goes in the amp's FX loop (or last, into a clean amp)