WBR is a fast aggressive midrange deck full of cheap efficient creatures like Marauding Mako, Moonshadow, and Iron-Shield Elf, so you want more cheap interaction and blockers. A second Bitter Triumph and extra M.O.D.O.K. (whose -1/-1 to opposing creatures is strong against their small creature base) help stabilize, while Malcolm, Alluring Scoundrel is a flash flying blocker that can trade with or dodge their aggressive creatures. Card-draw-heavy Winternight Stories and top-end Emeritus of Ideation are too slow when they're racing you, so trim toward removal and cheaper bodies. Prioritize killing Bloodghast and Cecil, Dark Knight before they transform or recur.