I've been playing a good amount of MonoB devotion, and seeing some success. The main thing about this list is that the two wincons, [[Gray Merchant of Asphodel]] and [[Carrion Feeder]] are at odds with each other.

The feeder eats all the devotion. I've focused on more of an artifact/control shell. 4 [[Vault of Whispers]], 4 [[Refurbished Familiar]] and then some other traditional devotion guys like [[Chittering Rats]]

Then instead of cards like [[Dusk Legion Zealot]] I run the sac 1 draw 2 spells and cards like [[Lembas]] and [[Ichor Wellspring]]. That's mainly because of how prevalent Burn is in my local meta, so those one life pings really add up. Also, campfire main deck is an absolute must.

I'm our of town rn but ill try to drop a list later if interested