I have made a detailed guide explaining the complex mechanics of Kappa, a mission that despite being old and popular still isn't entirely understood by the community at large : r/Warframe
Kappa Still The Best Place For Exp? - Players helping Players - Warframe Forums
Nether regions of Sedna - Kappa : r/Warframe
Gauss drops from Kappa Disruption Tier C, but why is Kappa a Spy mission? : r/Warframe