Perhaps try a Survival on Europa with proper farm setup. Circuit farmingД¬ircuits usually have quite high drop-rate on all missions on the planets where they drop вЂ“ try a survival on Venus. It is said though that Exterminate on Void basically guarantees ONE Argon crystal per mission вЂ“ make sure to look out for Argon caches to destroy on the map and see if this works for you :) Of all the times I went it personally only 1 time was without Argon Crystal. Went together with a +65% dmg buff Rhino, a non-max rank Nekros (nekros had Drop chance booster) and a rank 1 trinity вЂ“ got 5 argons in the first 10 minutes, 13 total after 40min вЂ“ and it was only at 40min it got really tough for us! Safe bet for Argon Crystals is to visit the Void вЂ“ I just went there to the lvl 20-25 Survival (Ani) as Pilfering Swarm Hydroid with my duration+strength build and used charged tentacle swarm for maximum amount of tentacles as well as damage, and used Large squad energy restores to keep it together when energy orbs were scarce in the beginning. Here I will post some farming spots me and the Clan have discovered to have been quite favorable for various purposes such as: Neural Sensor, Salvage, Neurode, Polymer Bundle, Plastids, Argon crystal, Oxium, Nano spores farm and more. Alternative way of Leveling Low-level warframes.

Hydron on Sedna for вЂњeasierвЂќ/less effort EXP farming in Warframe.Level up Low-level warframes in Berehynia.Berehynia on Sedna for Fastest EXP Farming in Warframe.Passive EXP gain + additional resource in Farm runs.Chroma Credit Farming on Dark Sector Survival missions.Credit farming in The Index Nef Anyo on Neptune.

Orokin cells farming (added 2 sept 2018).

Warframe dark sector mods