This guide will tell you where to farm Ravage and Vital Sense in Warframe. You have to follow the simple steps in this guide to farm them.
Ravage and vital sense can drop as B rotation rewards from completing dark sector defense missions on just about any planet with a dark sector defense mission.
Since both the mods can drop on B rotation, you will have to stay at least until round 15 and every 3 round rotations. (every five rounds is one rotation) you will have B rotation rewards, so 15, 30, etc., will give you B rotation rewards.
The mods don’t have the lowest drop rates. At least out of the items in its reward pool, so it shouldn’t take you long to get the mods through. It probably will feel like it since you will be running defense missions.
