Getting my teeth into a d/d ele
I have no advice on leveling, but here’s what I run for the D/D Ele in Dungeons and Fractals: https://forum-en.gw2archive.eu/forum/professions/elementalist/Neko-s-Guide-to-the-D-D-Ele-in-Dungeons-1
new D/D build would be something like 15/15/15/15/10
If you want to do a D/D build the most common one would be 0/10/0/30/30
If you like swapping weapons and utility skills I advise you to use 0/20/0/30/20 or if you love evasive arcana 0/20/0/20/30.
For lvling it might be better to use some S/D since elementalists have lowest hp and armor having the extra range is often a life saver. Plus the fire and air burst are good enough to take down almost anything.
Best information about D/D Ele: https://forum-en.gw2archive.eu/forum/professions/elementalist/Guide-Mastering-the-D-D-ele-5-12-12/
Just look at the videos and read the guide to understand D/D mentality. For leveling just do a more damage spec and upgrade your armor, trinkets, and weapons every 10 levels. Event farm.