Jeskai Ephemerate plays Skred, which scales with snow permanents (they run multiple Snow-Covered lands) and can kill a small hexproof creature, but it cannot target our auras directly, so keeping threats enchanted and evasive is still correct. Aqueous Form adds extra evasion past Murmuring Mystic's Bird tokens and Mulldrifter, while Lifelink helps offset their card-advantage grind from Augur of Bolas and Archaeomancer loops. Ram Through is weak since they have few relevant blockers worth trading into, and Sentinel's Eyes is the least impactful aura to cut. Focus on resolving one heavily-enchanted threat and protecting it from Skred by keeping its toughness high via Ancestral Mask/Armadillo Cloak stacking.