Eximus units

[Justus45]

Hey i want to get oberon and i need to get the nerooptic blueprint for which i need to kill Eximus units. My hoghest planet is phobos cetus so i have mars venus and so on. Which mission should i do for getting them spawned in high rates so i can get the new warframe? 

[Dhrekr]

Longer missions, like defenses or survivals, will spawn more eximuses - they tend to increase with time.

 

But honestly I'd say: just play normal and progress through the starchart. You will 100% get all the Oberon pieces you need just by playing any mission.

[(PSN)Deeceem]

Oberon is the piggy bank frame. You'll drown in his parts sooner than you think.

However, if I had to give advice as to how to reliably farm him asap I'd probably suggest to play until you unlock sorties and then wait for one of the sortie missions to be an eximus stronghold and farm it then (I sometimes left those with one or two sets) - if you didn't get him passively by then that is.