Quick answer
Practical merge steps, higher-tier purpose, unknown requirement warning and merge-planner handoff.
Use the in-game merge action on eligible copies, and let the current game UI—not an old or guessed table—define the copy requirement.
Step-by-step merge method: get capybaras, open the merge action, select copies the game marks as eligible, confirm, then return the higher-tier result to the Yuzu and Money loop. These eligible copies are the observable prerequisite and a higher tier is the confirmed purpose. The copy rule is unknown outside the current UI, so use its value in the merge planner.