The rule that saves the run
Progress is not the rarest Egg you can touch. Progress is the Egg you can carry home, hatch and use to make the next run safer.
Train before the gate
Build a buffer instead of aiming for the exact threshold.
Test an empty carry
Measure the return before risking a valuable Egg.
Upgrade the bottleneck
Choose Treadmill, Trails or Pet income based on the slowest part of the run.
What to record
Keep the current Biome, Speed requirement, Guardian, Egg source and Pet income together. When an update changes one field, the connected records need a fresh check too.
Mark uncertain spawn rates, mutation multipliers and expired rewards as unverified until you test them in the current experience.