Most of people uses the first drop calculator they find with google or any other search engine..
i noticed that:
if you use a
C4 only drop finder like for
http://lineage.amnet.net.au/mobfinder/
you'll get some error: some monster does not drop or spoil what are you searching for.
Instead if you use some drop finder like
C3/C4
like
http://88.34.223.41/mobfinder/index.php, you'll get exact infos about the monsters' drops.
I hope this will avoid a lot of time lost..