Pewpeat, true, but shamans didn't have "lines" of spells, they had two types. Shaman DoTs stacked. If you disagree brah,
L2Read
DarthPeon, is correct, but that doesn't refer to Shaman DoTs since Shamans didn't have "lines" of DoTs. This is proven by the links I provided to sworn testimonies in early 2001. That means the Necro blood line or darkness line, and the different druid lines don't stack with themselves.
Druids and Necros, don't cry it's classic, that's the way it was intended.