I add one more quest, which is not just insane but probably impossible to do:
Be prepared for conquering the world!
Have 99 expansion permits
Have 99 trade tickets
Have 99 wisp lanterns
Have 99 earth wisps
(Earth wisp and lantern are the easy part, but maxing out of expansion permits is a painful job; I got one piece like in about a week with regular playing).
If you only do 2 hrs trades and wake up in the nights to do them then it takes at least 264 days to reach to 99 expansion permits. If you do a bit sleep (8x2 hrs trades then a 8 hrs up to morning) then it takes "only" 347 days.
PS: only limit to this quest (so perhaps it is not "smart") that in case you expanded to everywhere you wont be able to craft permits any longer so you have to "complete" this quest before this one:
12. Light-up the Forest
Teaser: Nowhere to hide anymore.
Difficulty: Hard
Achievement: Have expended to all possible corners of the forest.
Requirements: All expansion slots are open. To have all the expansions you will need: