For the record: Elementalist will work against retard level of opponents with a good partner. Yesterday, I duo held a supply camp for about 20 minutes with a good ranger (PuG who I never met before) against essentially constant onslaught of about 5-6 people. It worked because I had a survivability-focused build which made be about as durable as my ranger partner (who was very visibly damage focused glass cannon), and I focused on healing and CCing things off him while he blew targets up one by one.
In a way it was a very good demonstration of just how bad of a class elementalist is at the moment. I could barely survive with 25 points in earth, 2 orbs, mostly lvl80 rares and exotics, arcane shield and cleansing fire. He had a glass cannon which blew people up in essentially one combo, and he could tank at least as well and often better then me (because I could support him far better then he could ever support me) and could play far more aggressively then me.
So if you're proper support with someone powerful to support, elementalist works and works well. Just as long as you don't have to rely on damage, or tank more then retarded level of players who will range nuke into your reflect shield and stop nuking just as it falls off. I think during that entire time I got one player killed with my damage. That player basically extended all the way into me, sat in my meteor shower and nuked my reflect shield with ranged skills. It still took me ages to take him down.