You couldn't make this more overpowered if you tried. Ever hear of Glyph of Sacrifice? Makes your 8 second cast irrelevant. Four eles casting this in concert would ruin everything.
Nerf the Glyph since that's always has been the solution anyway. Nevertheless, an Elite skill SHOULD be a game breaker. As of now, we get Elites that do you more harm than good.
~ I officially quit Guild Wars and will not buy any Anet product in the future starting today, June 19, 2007. I've given all my items and cash to Erasculio and I'm sure he'll be rich with some of them. :wink: ~