RoFront [World PvP] Class Picker

How do you read the RoFront [World PvP] roster picker?

Walk the tree in order. Do not skip to a late unlock because the shop model looked rare.

1. World — The full global board, with real country names, sea crossings, and the world-control victory.
2. Strait of Gibraltar — A regional team map. No corridor layout has been published.
3. Los Angeles — A regional team map. Layout details are unpublished.
4. Montreal — A regional team map. Layout details are unpublished.
5. Cape Cod — A regional team map. Layout details are unpublished.
6. Clearwater Lakes — An island-and-lake map used for team play.
7. Arctic — A smaller or abstract board. Geometry was not described.
8. Sierpinski — A smaller or abstract board. Geometry was not described.
9. The Box — A smaller or abstract board with no published layout.
10. Humans vs Nations — A team mode where players fight as tribes against AI-held nations.
11. City — A gold building that raises income and troop output. Reported tiers are 125,000, 250,000, 500,000, and 1,000,000 gold.
12. Factory — A gold building that boosts revenue. Same reported tiers as a city: 125,000 up to 1,000,000.
13. Port — A coastal gold building. Reported tiers match cities, and it extends naval reach.
14. Defense Post — The cheap border structure. First reported price is 50,000 gold, and the game says posts make borders much harder to take.
15. Warship — A coastal patrol unit. Reported tiers start at 250,000 gold. It is not the transport boat.
16. Missile Silo — A 1,000,000 gold building that opens tactical atom bombs, hydrogen bombs, and MIRVs.
17. SAM Launcher — Missile defense. Reported at 1,500,000 gold, then 3,000,000. It shoots down incoming nuclear warheads.
18. Mega Nuke — The cheapest listed Arsenal strike at 20,000 Stars.
19. Scattershot — An Arsenal strike listed at 30,000 Stars.
20. Reinforcements — An Arsenal purchase at 40,000 Stars. What it spawns was not described.
21. Artillery — An Arsenal strike listed at 50,000 Stars.
22. Air Strike — An Arsenal strike listed at 60,000 Stars.
23. Railgun — The most expensive listed Arsenal item at 75,000 Stars.
24. Storm Bison — A neutral tribal faction. A recorded attack hit Storm Bison beside Clawwatch until the land could flip.
25. Clawwatch — A neutral tribal faction beside Storm Bison in a recorded early attack.
26. Tuskfell — A neutral tribe named with Storm Bison and Clawwatch as an early claim target.
27. Fenhearth — An invented faction that holds a territory cluster on regional or tribal maps.
28. Lake Nipischi — An invented faction with its own territory cluster. No lake mechanic was published for the name.

What is on the published RoFront [World PvP] roster table?