Boros Aggro is a fast creature deck, so a second Pinnacle Starcage exiles their cheap threats like Momo and Voice of Victory on sight. Rest in Peace is lower-impact here since they lack heavy graveyard recursion, but it still denies any incidental value; consider it mainly as extra life-gain-adjacent disruption against Sarkhan's Treasure engine indirectly by slowing their curve-outs is marginal, so weigh keeping Day of Judgment as your primary sweeper. Trim slow reactive spells like Three Steps Ahead and Jace's Machinations, since you need to stabilize quickly rather than grind. Lean on Day of Judgment and Get Lost as your core removal suite against their aggressive curve.