I can't for the life of me figure out where the last town power crystal is or how to get to the life piece in the temple main room, but that goes to show I played this quite a bit 😅
Have you checked the Town Hall? There's a Power Crystal that Shinlalala (quite evilly) hid on the second floor balcony. There's also a lore document up there if you speak to the NPC looking at the bookshelves.
