So if the bosses drop things other than the mark of narcain

Well, there are ways....Take a look at Cyanne, Eos, and haha for example. They can all get the drops of certain monsters.

I call BS. Most of the present drop table data either came from user databases or Monster Book, which lists the drops of monsters. And the latter is based on the publisher of the game being correct, and is in no way directly linked to the actual drop tables.

Mad props if you can actually steal the drop tables from the servers themselves. You're likely to get in big trouble though.