PvE D/D questions
People usually prefer D/F for dungeons for the utilities and comparable dps/blasting, but there’s a lot of relevant and up-to-date information here, including a D/D rotation: https://www.youtube.com/watch?v=Fw0D9xtv8W8
http://dulfy.net/2014/07/11/gw2-elementalist-pve-class-guide-by-haviz-and-zelyhn/
You can run a typical D/F build with an OH Dagger, though you give up a ton of utility by doing so. Still, for open world stuff, D/D Berserker is probably the best.