Risen Spider Hunting?
Melandru temple when the event is active.
Shelter gate camp has a few
Elona is Love, Elona is life.
Event in the area east of gaveborns has a veteran spider that spawns other spiders. I also think 3-4 spiders are just naturally spawning there.
Group at shelters gate. Grouping triggers more drops. Lots of spiders. Just need a group actually doing the spiders and not camping the other spawn point (often guards and warriors there).
By the grenth temple when it’s contested.