Do you know the @Arcadius231 's youtube channel ? There are very nice cinematics made with the scenario editor.
But recently there are some interesting tips. I already knew them, but I find it important to share these ideas.
The Age of Empires 3 scenario editor has a lot of potential. Even if it still lacks some things and there are some bugs. I talk about it in this topic:
I hope the developers will improve it one day.
@Arcadius231 do you think one day to make a tutorial on how to transform a skirmisher into a resource gatherer? I talk about it in this topic :