Ranking seasons based on how important they are to watch before Fans vs. Favorites. Mostly based off of how many people from these seasons are competing, and who is the most important to the season in Micronesia. I will just leave the list without reasoning in fear of spoiling any of these seasons.
6. Survivor: Pearl Islands
5. Survivor: Fiji
4. Survivor: Panama - Exile Island
3. Survivor: Vanuatu
2. Survivor: China
1. Survivor: Cook Islands
Keep in mind that Survivor: Micronesia will spoil a lot of, if not all, of these seasons. However, if you only intend on watching a few seasons beforehand, I think that this list is a good one to follow.
