Does the necro Vale spell stack?

[Ditri]

I searched for some threads on dot stacking, but nothing was within recent times. There was some talk about some classes stuff not stacking. So before i plop down the 300 points, i was wondering if anyone could tell me how the necro dots stack up and stack on eachother?

right now the necro seems to be able to stack these 3 fine: dread pyre, curse of undeath rk i, desolate pyre rk i.

thanks.

[Sian]

Cobra venom rk
Dread Pyre
Chaotic funeral
Desolate pyre rk
Lure of fiery death
grip of vallon
death stalker
curse of the undeath rk

As far as I know, you can have fun twisting with all that