Final Fantasy Crystal Chronicles: My Life as a King

I'm not sure of the exact requirements, but I will help out as I can.

Time: Know what you're doing, and know when to do it.
Level: Only send your adventurers to places where you know they can win.
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P.S. Optional dungeons slow you down, although their bonuses are welcome.

No one is sure of exact requirements, but we can give you advice to improve your score.

The number of dungeons cleared is a factor in your score- so as long as you are clearing them efficiently, you'll be fine. What is most likely to hurt this is are the dungeons that shape-shift and reset to 0 exploration every day. If these give you too much trouble, try dismantling your tavern and send 5 people to the dungeon individually. 5 individuals raise the exploration rate faster than the same number of people in parties.

You'll get the best score by playing each day out the full time, maintaining the morale of your citizens as high as possible so as to have as fast a rate of income as you can. This will help you raise all your upgrade levels faster, which is another factor in your score.

Finally, don't just favor one or two adventurers to take on all behests. The level of your adventurers is averaged, and having only a couple of people capable of doing work will slow you down, resulting in a lower average in the end.

Build every behest board as soon as possible, only removing the extras near the end when they are less needed and you are low on space.

So the short story for speed is this: play the game well enough such that you are consistently able to clear every dungeon in 2-3 days each, tops. Efficiency throughout your city and play style is the key to a "faster" completion and a better score.

For what I ended up getting....which was an S for Morale, I think an S for Level, and a B for time (I took around 200 days because I wanted the Luxurious House. And i didn't get it. :( ), it was fairly simple.

Always talk to people and raise morale. As the game progresses and you have more people and more morale spheres, this gets MUCH easier.

For Leveling and other behests, do the following: Use ONE board for a particular behest. So, if you want X character killing the boss, use the Frog Board to put up a behest saying, Kill Y Boss for me. Have them go and kill it themselves, if they are at the level of the dungeon (or preferably one-two higher). They will level up, which is great, and you can give them medals to make them even stronger.

As for Time:.....I think the game factors in how many dungeons you are doing, and what levels your characters are at. Even at 200 days, I got a B rank. I had done MOST of the optional missions (but not the dungeon pack, mind).

Hope this helps.