I remember Necro DoTs not stacking (2 necros casting the exact same dot spell)? I dunno, it's been so long.
I hope in Pantheon DoTs do stack. I remember it being a pain grouping with other necros balancing out which spell you could or could not cast. If the mob already had Vampiric Curse on it, then you just wasted all that Mana and lost out on the life Regen.
Dots definitely stacked up to a point, but I don't recall dot stacking notifications until the titanium client. Even then they were limited. It's an interesting obstacle to game design.
edit: actually i take that back, there may indeed have been a point where they did not stack early on.
Same class hots never stacked, ever.
