Shade Walker. Just disable it until rework

We're not asking for more. Disable it because that modifier isn't fun or challenging at all; it's simply broken. Melee players are guaranteed to die, and those playing hardcore mode will avoid Abyssals as long as that mod exists.

If you want a suggestion, convert it to Chaos damage, adjust the damage proportionally to the level (low levels barely gain any Chaos resistance), make the aura clearly visible, and have it activate temporarily (or be disabled if they are stunned, frozen, or paralyzed).