Special Drop Chances from Monsters?

[JuniorHigh]

Are there any special loot tables for bosses/superuniques, or for areas?

For example, Nightmare Andariel has dropped at least 7 Whinstan's Guards last month, and it is a known fact Countess drops runes and very frequently.

Are there any drop tables like that I should know of?

[zarirazz]

there's an ATMA drop calculator..
check out the ATMA sticky in the Single Player Forum if you're interested=)