Do you buy all the items in shipments?
This game is really bad in showing what items are needed. In Heroes charge you would click on item and it would show who needs it or at least show a sort of symbol on the item showing one of your too...
Forum Discussion
Due to the crappy UI and not being able to track exactly what items you need, err on the side of caution and buy everything every time. Energy to farm vs. the RNG is harder to come by than credits...
