This is an aggressive three-color deck full of efficient creatures, so proactive removal matters more than disruption; Duress comes out since it does nothing against their creature-heavy curve. Shoot the Sheriff is weak against several of their creatures being outlaws (Casey Jones is a Berserker, fine, but many others dodge less relevantly than a blanket answer), so we cut some copies for more universal removal. Strategic Betrayal forces them to exile a creature they control along with their graveyard, denying recursion. Stab and Ancient Vendetta add cheap interaction and long-term answers against their recurring threats like Bloodghast, stripping copies from their deck entirely.