Hydroblast is dead against Tireless Tribe since the deck is white-green with no red spells or permanents. Essence Flare is strong against their creature-based plan, shrinking Basking Rootwalla, Arrogant Wurm, or Tireless Tribe over time while also boosting your own blockers' power if needed. Aura Flux punishes their few enchantment-based threats and can pressure Call of the Herd tokens indirectly by taxing any enchantments they run. Prioritize efficient countermagic on Survival of the Fittest activations is impossible since it's an activated ability that Stifle can target, so hold Stifle for their key Survival tutors to disrupt their engine.