Fieldron Sample farming guide
Mars — Kadesh (Dark Sector Defense)
A low-level Dark Sector Defense on one of Fieldron Sample’s signature planets; it drops from the enemies you kill (it’s in Mars’ region resource pool), so a Resource Drop Booster and a loot frame add to each round.
Boosters help: this spot relies on enemy drop tables.
Neptune — Kelashin (Dark Sector Survival, Steel Path)
A Dark Sector Steel Path Survival on another Fieldron Sample planet; the Infested density there drops Fieldron Sample as enemy loot, so a Resource Drop Booster, the Steel Path passive and a Nekros loot squad all stack for a squad farm.
Boosters help: this spot relies on enemy drop tables.
Early game
Kadesh on Mars (Dark Sector Defense) is an accessible early Fieldron Sample spot. Fieldron Sample is in Mars’ region resource pool, so it drops from the enemies you kill each round; a Resource Drop Booster and a loot frame add to every wave, and the Dark Sector’s resource-chance bonus helps too.
Mid & late game
Kelashin on Neptune (Dark Sector Survival) is the wiki’s recommended endgame spot — Neptune is another Fieldron Sample planet, and its Infested density drops the resource as enemy loot. Because it’s an enemy drop, a Resource Drop Booster, the Steel Path passive and a Nekros loot squad all stack, so long Survival rotations with a high kill count give the best yield.