Puzzle & Dragons continues Detective Conan collaboration

Puzzle & Dragons is still running its Detective Conan collaboration through August 9, giving players characters, dungeons, medals, login rewards and the usual PAD crossover checklist. This is the kind of event that looks simple until you start optimising every drop and exchange path. Detective flavour gives it a nice hook, but the real mystery is always the same: how many resources can one player burn while insisting it is all under control?