Few questions

[rrra]

Stony tomb does have a unique drop. Its a sorc helm called short circlet that I don't think was ever uploaded to the wiki. It is pretty strong for light sorcs and has a unique effect that turns thunderstorm light damage into physical damage. It drops from the Mechanized Destroyer on the second level and has a droprate similar to that of skull of the unclean (a5 Ifrit drop) and alkors shrunked head. (a3 Swamp King)

Cows is still the best spot as far as I know, but the drop rate is terrible unless you have 8+ characters in the game. Which means you need to join pubs or do privates with friends since you can only have 4 instances of this server per ip. The only reason some people have a ton is that they are buying baskets or organs from Hadriel. If you are farming cow parts, that's the easiest way to do it.

Alkor drop rate is the same. Sometimes you just get really unlucky. I think last ladder it took me a good 200 runs to get mine.

[Frigide]

Hmm making a cow in public doesnt change drop rates in this patch?!!!? Drop chances is unchanged by number of chars in game
Thats one of the major changes in 5.0 i believe

[naptologist]

Hmm making a cow in public doesnt change drop rates in this patch?!!!? Drop chances is unchanged by number of chars in game
Thats one of the major changes in 5.0 i believe

I think the drop chance is higher with more characters in game (doing different runs with just myself vs with multiple people seems that more drops with more people) but I think just the experience amount given after 8+ people enter the game doesn't grant more experience is what the change was. The higher drop chance is just an assumption though based on observation.