[plaid]

I'm sure this must have been asked before but I can't figure out the right search words. I'll go straight to an example of what I want to do.
Ramond E Feist has a ton of books in an overall storyline called "Riftwar Cycle". He has several series within the world of the Riftwar.

So my Kobo can show me these different series and the order of books in the individual series. Great, but how do I know which series is next? I can put all the Riftwar books in a collection but I still won't know which series to read next. I will either have to look online to determine the next series, or I've sometimes created a "reading order" ebook for these "multi-series series".
I'm setting up a new collections column in calibre to create the collections on my kobo. Should I just create another kind of column for reading order that I can at least see in Calibre? Or does it make sense to rename the series with a numbered prefix (see example below)? What's the best or recommended way to organize this?

(title/series/number/collection)
Magician /01 The Riftwar Saga/01/Riftwar Cycle
Silverthorn /01 The Riftwar Saga/02/Riftwar Cycle
A Darkness at Sethanon/01 The Riftwar Saga/03/Riftwar Cycle

Daughter of the Empire/02 The Empire Trilogy/01/Riftwar Cycle
Servant of the Empire/02 The Empire Trilogy/02/Riftwar Cycle
etc