Elementalist, Mesmer or Necromancer.
80’s: Sylvari Necromancer (Main). Human: Thief, Warrior (PvP Main), Engineer. Charr Guardian
I think necro will level the fastest. Eles and mesmers are both slow until around lvl 40, but that’s where they start to steal the show and really excel.
End game I think eles and mesmers are both viable. Necros might get a little boring, but they are very good for tagging mobs in WvW and PvE events.
I am partial to eles as I think they all-around excel in everything, but might be getting hit with a nerf a little soon with huge explosion of D/D eles. Mesmers are fantastic 1v1 or 1v2 but aren’t great tagging mobs due to lack of AOE skills.
RIP in peace Robert
personally i think ele will be the fastest due to the fact that ele can spam different elemental skills to do burst dmg quickly.