Ive looked at both the hair card tutorial
https://www.cgcookie.com/course/creating-hair-cards-for-realtime-characters
and the creating realistic hair tutorial
https://www.cgcookie.com/tutorial/using-the-principled-hair-bsdf-in-blender-2-8
Im wondering which method would be best for a rigged character?
The one that is the most easy for you to work with.
You also might want to look on Youtube to create more options
https://www.youtube.com/results?search_query=blender+hair+tutorial