Rakdos Madness Burn is a direct damage deck that wins by accumulating life loss through Alms of the Vein, Fiery Temper, and Lightning Bolt before you can establish a board, making life gain your most important stabilizer. Arashin Cleric and Dawnbringer Cleric both provide immediate life gain that can swing the race dramatically — a two-point swing from Arashin Cleric on turn two can represent four or more points of difference in the damage race. Kitchen Imp is their key discard outlet that enables the madness chain; Cast Down kills it efficiently and disrupts their mana-efficiency engine. Tithing Blade requires your opponent's creatures to die and does nothing against burn spells, making it dead weight here. Ephemerate bouncing your clerics repeatedly to chain life gain is a legitimate win condition in this matchup.