Pedals that stack with the Pigtronix Gloamer Volume Swell

Wren and Cuff Box of War Small Foot Fuzz

Wren and Cuff Box of War Small Foot Fuzz leans toward sustaining, and that's a real, usable character to pair with

Fjord Fuzz Berserk

What Fjord Fuzz Berserk brings here leans toward fuzzy — that's worth building a pairing around

DOD YJM308 Preamp Overdrive

What Pigtronix Gloamer Volume Swell brings here leans toward ambient — that's worth building a pairing around

Red Witch Titan

Keep Pigtronix Gloamer Volume Swell's ambient voice out front: Red Witch Titan goes after Pigtronix Gloamer Volume Swell in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

EarthQuaker Devices Afterneath

Put EarthQuaker Devices Afterneath after Pigtronix Gloamer Volume Swell in the signal chain, clear of Pigtronix Gloamer Volume Swell's own gain stage — goes in the amp's FX loop (or last, into a clean amp)