Where can I get Mirathei's formations?

[Amagic]

Does anyone know where to get Mirathei's formations?! I want it soooooooooo bad. I'd wipe out the Khergit faction all by myself on foot for those formations. Please someone tell me where to get!!

 

[Adorno]

Here, but don't ask me how to install:
https://www.mbrepository.com/file.php?cid=8&id=815

 

[Amagic]

While i'm at it. Can someone tell me how the formations work?