@teddyache and Zel: Great posts. Thanks for contributing!
@Akfury: <33

@Gell: Yes, I do a majority of my leveling outside of the 3d missions. The ONLY time I have stepped foot in one, is to unlock the next area. Keep in mind though, this guide is just talking about the best xp for the energy spent. It's not recommending that no one does 3d missions. Some people do missions based on return of gold. Some farm 3d missions for pinks etc. There are many many different playstyles and not one guide could accommodate them all.

However, using this guide, one could level up to 21 without barely playing the game at all. I am level 20 right now, and I guarantee if we had a way to check how long a character has been logged into the game... I would probably be the lowest, or one of the lowest. ;p