So, we are still one and a half hours till next weekly reset, went to Europa, bought the item from Varisk, then to Asterion Abyss, took the scanner buff and went to Nexus to look for the drones. Nothing, I've tried already going back to orbit and grabbing the scanner buff again. Phasing again and again to the area hoping they would spawn. EDIT: I was dum dum NEVERMIND, went all the way to the end of Well of Infinitude and the last set of drones was there (and I got the triumph)