The Sicarii quest is not done until you get 10 gossamers to spin the big web. By my calculation that takes 5-10 hours of just sitting there in Sicarii's room waiting for drones to spawn in the corners: Sitting in one corner, a set of drones came about every 15 minutes. Sometimes one of the drones had a gossamer, sometimes none. And sometimes another player was faster and killed all the drones first. That worked out to one gossamer per hour for me. Don't say, "Learn to kill them faster. Run around to all 4 corners." This is a zero sum game, what I get faster is what somebody else gets slower. The whole quest is jammed up against a slow drone spawn rate. Dumb little gossamers should be easy to get, the big bad spider is the hard part.