Yonko Saga had :
Zou Island (on Zunisha)
WCi : Main Island and Cacao Island
Wano : Wano regions (act 1, 2) and Onigashima (act 3)
You could say Wano had 2 sub-arcs
Final Saga :
Egghead (and Reverie flashbacks)
Elbaf
Beehive
Roadster & Laugh Tale
Final war : Marineford and Mariejois
I question Fullalead/Beehive at this point. Ive been thinking a lot lately about the scale of the "final conflict" that Oda seemingly wants to deliver.
Personally I agree that Egghead and Elbaf will largely be self contained, but I think the battle for the 4th RP after (be it right before Lodestar or near it), will begin the large scale war between the 4 Yonko and their fleets.
Essentially:
- Egghead (vs. Kizaru)
- Elbaf (vs. Elbaf villain)
- 4th RP (vs. Burned man or 4 Way Yonko War)
- Lodestar/Laugh Tale (4 way war continued or solely against BB or Shanks)
- Final War (Marines + WG)