Leveling on FATEs - Good regions

1-12: Horizon in Western Thanalan (Thanalan)
13-20: Aleport in Western La Noscea (La Noscea)
21-30: Quarrymill in South Shroud (Black Shroud)
28-34: Wineport / Costa Del Sol in Eastern La Noscea (La Noscea)
30-38: Dragonhead in Coerthas Central Highlands (Coerthas)
38-42: Revenant’s Toll in Mor Dhona
42-50: Ceruleum Processing Plant in Northern Thanalan (Thanalan)

Copied from http://accomp.me/ffxiv/fate-farming-guide/