Jund Wildfire's grindy artifact-sacrifice engine revolves around Ichor Wellspring, Fanatical Offering, and the indestructible Bridges, so Ancient Grudge is premium removal here—it destroys their artifacts at instant speed and the flashback {G} means a single card in hand turns into two uses, cutting off their recursive value loop entirely. Tamiyo's Safekeeping protects your key threats from Cast Down and other targeted removal, keeping pressure on their engine. Cut smaller creatures like Sacred Cat, which folds to Krark-Clan Shaman's non-flying sweeps, and Sneaky Snacker, since you want to be proactively attacking their artifact engine before it snowballs into card advantage. Prioritize using Ancient Grudge on key targets like Ichor Wellspring over smaller artifacts when you have the choice.