When I first did the Operator before Plains of Eidolon It didn't look worth the grind but after watching some vids on how to farm quills faction it looks like a core game function. Who should I build up if want to try puging some Eidolon bounty hunts? This video suggest Rhino, Damage Chroma, Crit Harrow and Bless Trinity. I have a non-Prime rhino, no chroma, but I'm close to finishing prime, no harrow and a band new Trinity Prime with no forma or mods. Also have a Frost Prime, Valkyr Prime and Ivara with a few Forma and undeveloped: Ash Prime, Banshee Prime, Equinix Prime, Frost Prime, Hydroid Prime, Nekros Prime, and Saryn Prime . Regular Rhino, Oberon, volt, sephyr, nyx, wukong, nyx, limbo, loki and ember.
I have a opticor vandal and vectis prime I could use, and probably some sort of secondary with high single shot damage.