I would generally assume they don't as dots in every other game blizzard has created have not stacked when cast by the same player, only I just fought a mini-boss with haunt and it being my first time using the spell, I figured what they hell why not try? And my dps DID seem to increase dramatically after multiple casts. (I can BARELY run D3 with my current system, so turning on DPS numbers to test this myself is something I'd rather not try.)
1 Answer
Sadly, no - you can't stack the damage over time on Haunt.
This is in the skill's tooltip, although not in the extended tooltip for whatever reason:
An enemy can only be affected by one Haunt at a time.
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If that's the case will haunt automatically aim at unhaunted enemies?– user4951Commented May 4, 2013 at 3:35
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@JimThio, It has been a while, but I think the answer to this is no - it goes towards whoever you target, without regard for whether or not it would have an effect.– agent86Commented May 4, 2013 at 13:14