Survival Elves can apply fast aggressive pressure with Basking Rootwalla, Wild Mongrel, and Arrogant Wurm plus Armageddon to strand your mana, so Exalted Angel's morph lets it block early for cheap while its flipped 4/5 flying body with lifegain helps stabilize the race. Sphere of Law has no red sources to prevent damage from against this green-white deck, so it stays in the sideboard - skip it despite the slot. Abeyance is weak since you need proactive bodies and removal against their creature pressure rather than a one-shot disruption spell, so it comes out alongside Intuition which is less valuable when racing a fast clock. Watch for Armageddon following their mana dork into Survival of the Fittest activations, and try to hold up Swords to Plowshares for their best threat.