Quote
Hexes
If the spell was self-cast, the debuff will gain doom over time up to its maximum.
Impending Doom/Doom Blast
Impending Doom is a support gem that can support hexes. When the supported hex expires or is removed in any way, it triggers Doom Blast which causes a chaos explosion. The more Doom the supported hex built up before its expiration, the greater damage the explosion will deal.
it not says, that Doomblast not works, when the curse is triggered instead of selfcasted without building up Doom.
It only says: more damage when curse is selfcasted
So i have a trigger skill without cooldown.
cwdt-alternate curse on hit-Impending doom
Impending doom-curse aura-curse
666curse per sec