I don't think "Nerfed" is the right word for this, its more like rebalancing. We're getting more mp overall, and the less frequent casting means we're saving Mp in the long run. Ticks twice as long as the normal refresh spell and returns a lot more mp for the cost.
If we get any Tier 2 traits, Mab II, Acc (for new endgame content @ 99) and perhaps a few others would be a welcome addition.
