Smother and Sickening Dreams are dead against a deck with almost no relevant creatures, so they come out for proactive disruption. Annul counters their enchantment spells on the stack, such as Attunement, Opalescence, Parallax Wave, Decree of Silence, or Seal of Cleansing, which makes it a strong answer to their setup pieces. It cannot counter Replenish, which is a sorcery, so Replenish has to be handled by your other counters. Tormod's Crypt exiles their graveyard before Replenish can return everything at once, which can blank an entire turn. Keep Duress and Impulse in to find and strip or dodge their combo pieces, and prioritize countering Replenish itself with Counterspell and your other general counters over anything else.

This is a mirror-ish counterspell war, but Diabolic Edict is excellent since it forces a sacrifice regardless of Phyrexian Dreadnought's size. Stifle can't answer it either, since Stifle only counters activated or triggered abilities and not spells; only their counterspells can stop it. Annul is a cheap answer to their artifact spells, namely Phyrexian Dreadnought and Powder Keg, which our existing countermagic can't do as efficiently. Circular Logic is weak here since it counts cards in our own graveyard, which stays small early, and Foil is a worse Counterspell that costs us extra cards, so both get trimmed. Keep Smother in as cheap Dreadnought interaction, since Dreadnought has mana value 1 and can still be killed after they Stifle its sacrifice trigger.

Engineered Plague chosen as Goblin gives every one of their creatures -1/-1, which is devastating against their 1/1s and 2/2s and shrinks even Siege-Gang Commander's tokens. Nausea backs this up as a cheap sweeper for their 1-toughness creatures like Goblin Lackey and Mogg Fanatic. Circular Logic is weak against a deck with little graveyard interaction to tax, and Annul has no valid artifact or enchantment targets in their list, so both are cut. Keep Smother and Diabolic Edict as your primary removal for anything the -1/-1 effects don't fully answer, like Goblin Warchief or Siege-Gang Commander itself.