Ni No Kuni 2 is too easy at times, but it's not entirely toothless. On top of Kingmaker boss fights and tainted monster mini-bosses, its nine Dreamer's Door dungeons, which get more difficult the longer you're in them, really push your party to its limits. As I said in my review, exploring Dreamer's Doors was one of my favorite parts of the game because they reward you for enduring higher difficulties and ultimately unlock Mileniyah, an incredibly useful Evermore citizen.
So, I've put together a quick guide on where to find all nine Dreamer's Doors plus the insanely difficult 10th Door they unlock. It's all part of Mileniyah's 'Top Marks for Trying' questline, so just follow the prompts once you clear all the doors and she'll join you in Evermore.
Oh, and if you're wondering how to open the blue chests scattered around the world map, have a gander at this guide. We've also got some general tips for combat and kingdom building, plus a guide to perfectly completing the puzzle portion of the Kingmaker Trial.
Dreamer's Door 1
Dreamer's Door 2
Dreamer's Door 3
Dreamer's Door 4
Dreamer's Door 5
Dreamer's Door 6
Dreamer's Door 7
Dreamer's Door 8
Dreamer's Door 9
Dreamer's Door 10