Need help with Elementalist Builds (PvE)
Have you tried using Glyph of Storms, and the elite Glyph of Elementals?
Using both in earth attunement gives you the tanky earth elemental (which will stay up really well against almost everything in open-world PvE), and an AoE blind that pulses frequently enough to shut down the majority of mobs. Get mobs to blob around that, stack a bit of might on yourself and your elemental, chuck AoE at everything until dead.
I solo with 30/30/0/0/10 D/F, and yes, Glyph of Elementals (Earth) is amazing at pulling aggro, while Glyph of Storms (Earth) will keep things blinded while you burst it down. The weapon set is only mid-range, but it has a good amount of survivability with its defensive skills in air and earth attunements as well as interrupts in water and air attunements, and you can always toss on a staff if you need a pure ranged setup for something.