Quote (hippie tourach @ Oct. 20 2003,17:37)Duress is artifact hate.
On the other hand, what you gain is: Gorilla Shaman, more mox hate than artifact hate; Artifact Mutation, which you say is inferior to other options; Viashino Heretic, which I'd say is inferior to Energy Flux.
If your feeling about your metagame is correct, I guess this is the right version. But if you run into combo...
But Duress often comes too late vs Workshop decks. They have their stuff on the table.
Gorilla is not only Mox hate, also Crypts and Chalices will be chewed on. If Stax starts with something like Sphere and Chalice for 2, you´re glad to have Gorillas in your deck.
About Viashino Heretic and Energy Flux, this deck is better at finding creatures than enchantments. If I would reserve slots for 3CC artifact hate, it will be 1 Viashino Heretic and the others will be Fluxes. Heretic rules in the mirror.