I gave you wrong info, father sin etc drop from Wellspring at surten days, yours is a world drop. Red Herring does not drop from Wellspring. Wellspring weapons and Throne World weapons are separate pools. The Wellspring pool is: -Tarnation -Fel Taradiddle -Father's Sins -Come to Pass Wellspring also only drops one specific weapon at a time, rotating daily. You can check which one is dropping on the activity description. The Throne World weapons are: -Likely Suspect -Red Herring -Pointed Inquiry -Empirical Evidence -Forensic Nightmare You get a guaranteed Deepsight Red Herring as part of the campaign, so the easiest way to unlock the pattern is to just run the campaign on your two other character slots. Actually, 4/5 of the Throne World weapons have repeatable guaranteed Deepsight sources through the campaign or through Fynch's questline. Pointed Inquiry is the odd man out that leaves you no choice but to grind random Throne World drops.