I still think Grief should be taken down a notch, while strongly supporting buffing unique weapons, such as The Grandfather (please see PTR thread below for discussion).
I think the best nerf for Enigma is to not impact the flavor, which is mobility. So teleport and FRW should not be touched. However, the strength bonus is superfluous and should be removed.
For Spirit, set to +1 to skills down from +2 and let other items shine. Simple, yet effective.