It offers 10% more healing. It takes significantly more magicka, but not too much. Could you at least increase how much the effect is overcharged, such as granting 25% more healing than if you used 2 spells in each hand instead of a dual-cast? I jsut want to see significant throughput, so I can get back to maintaining my conjurations and casting destruction spells.

Also, does it do ANYTHING for dualcasting wards?