Blasphemy + Despair + Decaying Hex + Dark Effigy

I'm running a build where I have Despair as an aura and wanted to have it apply Decaying Hex as it does when I cast it myself so that the Dark Effigy can target enemies within the aura.
This seems to be bugged as it does not seem to apply decaying hex and/or targeting enemies in the aura, unless I'm reading the skill descriptions incorrectly.

It does say it needs to be a "Debuff" but the effigy can target when I use the curse manually.

I find it extremely strange that they dont adress this since this bug has been brought up from the begining of EA. really needs a fix asap