Nostalgia Tripfor solving the Lighthouse Puzzle gives another +500 Caretaker Power. This allows you to skip some Mementos. Also upgrade all faction shops to Rank 4 to buy the expensive Rank 4 Mementos that cost 700-850 gold, these give +200 each. The best approach is to thoroughly search...
uninspired, and tedious slogs through environments that are varying degrees of brown and grey with very little in the way of meaningful content, and coast by on the franchise name and the occasional historical celebrity