I think Elementalist is one of the best professions for hard dungeons, second only to Guardian.
Actually I do use PVT armor along with berserker/celest®ial weapons/trinkets and I have 17k HP without WvW bonus. The damage is awesome; you can’t deal much damage in melee range if you go down in 1 shot.
The link to the videos from a few posts back doesn’t work anymore; the new link is: https://forum-en.gw2archive.eu/forum/game/dungeons/Fractals-difficulty-lvl-70-videos-Ele