As I understand it, author-made maps often feature subtle tricks that give an advantage. Like using the terrain.
The terrain can be VERY diverse, as can the ground itself.
I browsed through my folders and collected some screenshots from various sources where the emphasis is on using the terrain (and war machines): https://imgur.com/a/lSbkEHa
Please add anything you have; I'm collecting this kind of thing.
If you need to find suitable terrain for a battle with the computer, you can check the map with the h3mtered program. There is also a more convenient program by kazmer, but I still haven't figured out how to run it:D