I don't think this thing works in SW. I just can give you an example of Banite Sith. Specifically Sidious and Plaguies. These guys hadn't fight with Grandmasters, wasn't involved in any galactic wars, most of their lifetime they were doing politic work for Revenge of the Sith and training. I mean you don't have to fight with Supreme beings to become top. You just need to have a gigantic force potential and do training. At least how it works in SW universe.
I think you need to read Darth Plageuis.
90% of the powerful beings in SW have all experience.
Jacen, Sidious, Plageuis, Dooku, Darth Vader, Luke, Jaina, etc