If I had to spend weeks/months farming for a single piece of Atma again for the first stage of the Relic weapon/armour, I would have screamed in horror. Also would scream in horror if the Relic/Armour required Specialist Crafters.

People have suggested low level players to solo up until they're level 5 and then start joining the train. Alternatively, you could form a party with other low level players and farm mobs roughly your level, or farm mobs that spawn low level NM's (kill Cactuars to spawn the Cactuar FATE, sea monks for the sea monk FATE, etc)