On Dark Harvest Nerf (Hear me out)

PBE Today: Dark Harvest (Domination Keystone) Damage lowered from 40-80 to 20-60

Dark Harvest is definitely over-performing and is outright obnoxious on its greatest abusers (I'm looking at you, Karthus), but I don't think a straight base damage nerf is the way to go with it because all you are doing is competing with the likes of Electrocute for additional burst damage. At this rate, you make the keystone worthless early to mid game with only slight usefulness on champions that can repeatedly proc the mark. Since currently the keystone gets reset on takedowns, it can be extremely powerful in multi-champion fights, but with reduced damage you are also compounding the issue of getting resets, making it doubly difficult to stack it.

What I am trying to say is, additional nerfs to damage alone give little incentive to ever pick it over Electrocute. Maybe nerfing it in ways that reduces the ability to stack it or allowing the keystone to proc less often is better than gutting the damage. Because at this rate Electrocute will just plain scale better with these nerfs.

EDIT: I had a second thought - or at least make Dark Harvest wholly unique by giving it NO base damage but it has a decent scaling factor. So you start off the game with little to no impact but it can become a late game threat with proper management.