My experience when it comes to burst damage specs in general, there are two ways we can deal with them.
The first is the easier way, and that’s to bide your time. When I get jumped react defensibly, (Frost Aura, Teleport, Whatever else), then for the next 10 seconds or so I try to stay just out of range/LOS there attacks. This usually involves switching to water to keep my health up. Most spike/High DPS builds run out of steam after a few seconds, and most people tend to blow there DPS skills quickly, so now if you did it right, you are almost full health and so are they, but there DPS should be reduced for at least 10 seconds, or in the case of warriors a lot longer. Then they are easy to deal with.
The second way is to use our CC and hit them back hard (if you are DPS spec). This puts you two at even footing and elementalists tend to last longer then most classes if played right.
I usually use the second method, its harder to pull off, but since brust specs are made of glass 99% of the time, they go down easy. Just fight them on your terms not on theirs, most people forget that as elementalists we can just leave a fight. Hope this helps a bit.
