Duress has few good targets since this opponent's deck is dominated by creatures, which Duress can't take (it only hits noncreature, nonland cards). Survival of the Fittest, Sylvan Library, Armageddon, and Swords to Plowshares are all legal hits, and Sylvan Library and Armageddon are among the better ones, but overall value is marginal against their proactive plan. Diabolic Edict gets around size, but the opponent chooses which creature to sacrifice, so with Birds of Paradise, Llanowar Elves, and other small creatures around it will often hit a mana creature rather than a tutored-up threat. It is best used when they have few creatures. Annul has very few legal targets here (mostly just Survival of the Fittest and Sylvan Library among enchantments) so it is cut in favor of more impactful cards. Engineered Plague only affects the one creature type you choose, so it won't hit their whole board. Naming Bird kills all of their Birds of Paradise and naming Lizard kills their Basking Rootwalla (when it isn't pumped), but Wild Mongrel is a 2/2 Dog and survives the -1/-1. Weigh leaving it out if those small creatures aren't the ones you most need to remove.