Since FATEs are seemingly spontaneous timed events in the great outdoors, it would make sense to have FATEs designed for disciples of the land, who are going to be out in the field anyway. They'd be easy to explain in the game's lore, too; maybe someone from the goldsmiths' guild randomly struck gold and needs help mining as much as possible before anyone else can encroach on the find, or perhaps some new species of caterpillar that's been mutated by exposure to corrupted crystals poses a threat to plant life in the area. Maybe the death of an existing FATE's boss monster causes changes to the environment that disciples of the land can help to deal with.

In short, there should be FATEs for disciples of the land.