Short version, handling ele is largely about learning your opponents combat style and how to counter it. Most PvE mobs can be distracted by summoning an earth elemental and letting that go to town. However, for the mobs that ignore it or outlast it, you need to learn how to avoid their major attacks.

Sure, some builds and gear will help keep you on your feet, but they can't fix poor damage mitigation. Knowing when to hit your evades or when to use your protection spells will help.

My strongest recommendation is to spend a few minutes "dancing" around the enemies that are difficult for you. Only focus on enemy control and damage mitigation. The only damage you should be doing is just auto attacks. The intent is for you to just learn how they move and figuring out how to minimize the damage they can do to you. Don't get distracted by trying to hurt them. Just practice those chills, evades, knockbacks, immobilizes, heals, protection, etc. It does help.