Re: Where can you get the WWS to drop?
If you play on bnet - or even single player - trading for one is the best option. you can find one cheap and fast, while running one your self will take your probably longer.
Though if you really want to find one, download atma and use the build in dorp calculator - ignore the mlvl 110 diablo. Then you can find out yourself and make a plan.
Anyway, I can tell you this. Your best chance are nightmare mephisto first kill, and nightmare mephisto not first kill if first kills aren't an option. If you want to try your luck on regular monster, Nightmare cow level is the best place if you ask me, though the chances of find one is much smaller. On the other hand, there are much more cows in one game then there are mephisto's.
Code:
1 : 997 Mephisto ~ 1st kill - (N) Durance of Hate Level 3 - {mlvl 59}
1 : 1508 Mephisto - (N) Durance of Hate Level 3 - {mlvl 59}
1 : 1284128 Hell Bovine - (N) The Secret Cow Level - {mlvl 64}
[edit]
forgot atma link.
http://atma.diabloii.net/