Soul Drain and Life Drain (among others) should be compatible with the new Inevitable Agony

Inevitable Agony specifically culls enemies. But I cannot put Life Drain or Soul Drain into it. Nor I can put in other culling-related support gems.

Because it lost its status as a curse, Inevitable Agony has lost access to a lot of good Support Gems. This would sting a lot less if I could support it with support gems that specifically support a thing the skill does.