ArenaNet:Skill feedback/Paragon/Song of Concentration

Overpowered in "capture the altar" maps

 * Issue
 * Can't interrupt the ghostly without a knockdown. Build Wars, anyone?


 * Suggestion
 * For 10 seconds, all allies within earshot are not interrupted the next 0...1...2 times they would be. (Now, all you need is 2 interrupts.)