There are quite a few solutions. Malefic Grasp or Shadow Embrace with Wrath's version of Haunt are two possible, easily introduced solutions that could fix our single target without affecting multi-dotting with the former also fixing to a degree the stupidly huge ramp-up time. Of course tuning would be needed from their previous iteration due to our Artifact but then it just become a number issue, not a mechanic one.
Agreed that this whole homogenization stuff went way overboard with the end result being what we've got now.