In instanced content, sword weaver DPS can still do quite well babysat but the lack of self-sufficiency has always been a problem for elementalists in the open world; where not taking full offensive traits and gear simply makes things much too slow and boring, even risking mobs respawn before you clear them all if you go too defensive.
Quickness solves all of that! (and as a bonus also lets you farm nodes faster!)
With quickness you can pump out massive damage doing golem-like rotations (but modified because you don't exactly the alacrity to do that) while your sustain through Signet of Restoration goes through the roof as though you had 1000+ Healing Power.
But wait, Eles don't have Quickness beyond the short and pitifully short Lightning Leap that's hard to access on Lightning Hammer?
Quickness is accessible to everyone through Sigil of Celerity, Rune of the Cavalier and Cups of Light-Roasted Coffee.
With enough boon duration, you have access to -almost- permanent quickness (limited by remounting and rune of cavalier's quickness applies while you have mount's stats so it doesn't actually get boosted by boon duration but coffee's quickness still gets boosted).
With the introduction of the Diviner's stat you can have boon duration without sacrificing damage too much. Mixing pieces in for 50%+ boon duration allows maintaining a decent amount of Might stacks, permanent Fury and Swiftness (and protection or regen) and a high uptime of front-loaded Quickness to almost finally match the boon-upkeep of a soulbeast or holosmith!
Sample build (BYO coffee and magic find enhancement, build editor doesn't support those):
Bonus tip: alternate between regular dismount and engage dismount when farming nodes/opening chests.