Half of the people I've seen bragging about their burn guard and it's deeps don't sort their stats to exclude NPCs and objects. I remember quite vividly one dude bragging about his burn dh when 80% of the damage went to rams. Against organized groups that burn and vuln is getting ez converted into aegis and protection unless you outnumber them. Which is why you don't see them used in great numbers in gvgs. It's great against pugs, unorganized blobs, and PPT groups though.