[Asiren]

I can tell you from experience that the drop rates from Giant Spider, Desert Spider, Sand Spider, Bark Spider and Aht Urghan Attercop suck.

o_O;;; This really surprises me because to me, ToAU made it much, much, much easier to obtain spider webs in the expansion areas. My boyfriend who is a lvl 75 thief has solo-ed the Aht Urghan Attercops many times and has gotten a lot of webs; his inventory would be full of them before his exp band wore off. ;P He did bring antidotes with him to help deal with the poison. (Or I'll tag along with him with my white mage.)

Spider webs don't drop all the time, but with a thief, they drop pretty often (at least with a lvl 75 thief with no TH3). Farming during a full moon helps as well. ^^