Full balance sages are really good at 1v1s.
Yeah but they aren't useful at all when it comes to actual warzones. I can beat almost every class 1v1 in full madness, but I can't kill anyone for the life of me if there is a decent healer or tank around.
Still full madness looses to snipers without LOS, Assassins and Operative dps. Assuming that the aforementioned classes are equally skilled as the sorc.