Its very possible tha,t if your configuration of this deck shifts very slightly, Dusk is a better sideboard sweeper than Fumigate at winning grindy midrange mirrors, but not right now
These are the best cards for any green midrange or control deck, and the only ones that I never consider touching in sideboarding with Jund

Advanced Search Sets Random Syntax Evolving Door Fade into Antiquity Faldorn, Dread Wolf Herald Fall of the Impostor Fanatic of Rhonas Faunsbane Troll Feral Appetite Feral Encounter Fight Rigging Fin-Clade Fugitives Flaxen Intruder Flaxen Intruder Flesh // Blood Flesh // Blood Flotsam // Jetsam Folk Medicine Food Chain For the Ancestors Force of Vigor Forgotten Harvest Freestrider Commando Froghemoth Fugitive of the Judoon Fungal Behemoth Fungal Plots Gaea's Will Gamekeeper Garenbrig Carver Garenbrig Carver Genesis Ultimatum Genesis Ultimatum Germinating Wurm Germination Practicum Gerrymandering Ghired, Conclave Exile Ghoulcaller's Harvest Giant Dustwasp Giant Trap Door Spider Giantbaiting Gingerbread Hunter Glissa's Retriever Glittering Wish Gloomshrieker Glorious Decay Gnaw to the Bone God-Eternal Rhonas Golgari Decoy Gonti, Canny Acquisitor Green Slime Greenwarden of Murasa Grime Gorger Grist, Voracious Larva Grizzled Huntmaster Grizzly Fate Grolnok, the Omnivore Gyrus, Waker of Corpses Gysahl Greens Harness Infinity Hazezon Tamar Healing Technique Heaven // Earth Hedge Whisperer Heritage Reclamation Hogaak, Arisen Necropolis Holistic Wisdom Hollow Scavenger Hollow Scavenger Honored Hydra Hooting Mandrills Howling Gale Howling Galefang Huatli, Poet of Unity

#87: Academy of Arts I love cards that look like the covers of the old childrens hardbacks that would whisper to you from the big center table at the Scholastic Book Fair
What makes this card so special is the fact that most of the ones in circulation are damaged due to a manufacturing issue