Looking over the loot table of stages it appears you can get 4* weapons and 4* characters on world map 9 stage 6.
So all the topics to date people have posted where they get their drops and seems to very. Is it possible that all the stages above this have equal possibility of drops.
That farming anything higher is a waste of energy?
What I do not see on any loot table is trainers that people have spoke of. Either way it’s food for thought if you can farm the same items at lower energy you get more attempts and possibly more loot if all is created equal.