This is the basic modding tutorial for marvel midnight suns. It explains FModel for extracting files, UAssetGUI for editing files, and UnrealPak for creating .pak mods. It is in the zip and is a .doc file.

This is a partial lista file since the original lista from the pak was 316 MB! You can use this to search for the path of cards in game for creating your own lista file. It only contains abilities paths.

This is the lista file that I am currently using in my personal mod. You can use it for reference how it can look.
Used with UnrealPak <PakFilename> -Create=<ResponseFile> [Options]
<ResponseFile> will be the path to my lista.txt