I remeber i used it some to kill low targets hiting on me when i was Soloing as resto in 2v2 etc. But apart form that its not really good in solo. But when 1 guy get 4 at the same time it starts to do some nice dps, its true about the CD ofc. I think its like 2 or 3 sec. So it will proc on every second or third explotion. But lets say you do the normaly aproch by droping 4 fire novas and shock him, that will normaly leave alittle like 1-3k hp left. If he first get a the 1-2k dps from shilds while you w8 for novas to go off, and on the same time they go off and you do the shocks, another 1-2k from shilds will come. I didnt say in any way that you can kill a mage totaly from just changing shilds, like some of you almoust sounded like. Its just a way to add dps on him in a way of not having to worry on truning arund to hit him with bolts.