"d/d elementalist pvp vid (their burst damage is rather insane)"
His burst has nothing to do with being d/d and everything to do with him bring two burst utility skills. Arcane...burst? And Arcane Blast? They do guaranteed crit damage so if you stack a ton of power and crit damage, you get really fast big crits. It also means that he only has one defensive ability and that burst doesn't exist while they're on cooldown. Pretty standard glass cannon shit.
but in the second video, his Fire Grab hit for 10k (he was stacking up migh somehow)
and in this video , at 3:38, the player gets 2-shot by Burning Speed (4500) and Fire Grab (7800) [+Arcane Shot (2500) + Arcane Blast (2500)]
Quite a bit of damage within a few hits. I could never pull that off on my Guard that was stacked with high power/crit.
http://www.neogaf.com/forum/showpost.php?p=40363699&postcount=5807