Credits

• Early : every Dark Sector defense mission (with Infested) has a bonus credit. My best choice is Simeini, Ceres, but any will do.
• Access to Neptune : the Index, but only when under the effect of a Credit Booster. See page for recomendation.
• after the Hex : i know there's one but forgot.

Endo

• after the Hex : i know there's one but forgot. Defense mission ?

Aya

Relics

Get

Open

Plat (indirectly)

Steel Essences

Detonite, Fieldron, Mutagen Mass

Beside Always Be Crafting one, you can get the first two when the Grineer or Corpus finish crafting an Armada, respectively. (you'll have an alert or event I don't remember)

Resources

• Cryotids : Excavation Mission. That's it.
• Hexenon : Jupiter missions. But you're better served by sending your Extractor there.
• Tellurium : Survival mission on Uranus
• Neural Nodes
• Neurodes
• Argon Crystal : Hepit, the Void. Take Limbo or Xaku with you, max range, max efficiency. We don't care about the Strength or Duration here.