Ruby Storm wants to chain cheap rituals like Seething Song and Desperate Ritual through Goblin Anarchomancer and Thornscape Familiar cost reduction to eventually dump a huge hand via Big Score and Glimpse the Impossible, so Duress is excellent, stripping a key ritual or payoff before they can go off and giving you information on their hand. Arms of Hadar can kill their cost-reducing creatures (Goblin Anarchomancer, Thornscape Familiar) which are both small bodies, slowing their whole engine down significantly if they haven't found a critical mass of mana yet. Grim Bauble, Eviscerator's Insight, and the extra Omen of the Dead are too slow and don't disrupt their combo plan, so trim them for proactive hand disruption. Prioritize killing their engine pieces and applying early pressure since the deck is fragile until it assembles its mana engine.