While I normally feel very squishy as an elementalist in PvE, in WvW I felt much more comfortable in my role. I wanted to get some input from others, as well as share tips between other elementalists on contributing to WvW.
I mainly stayed with staff, and held to the middle of the group. When defending the garrison, I stayed on the walls, usually moving to the front line, dropping Meteor Shower, Lava Flow, and Eruption on any range I can reach, then backing up and dropping Geyser and Healing Rain on wall units being hit from range. I keep Arcane Wave in my first slot skill, since casting it within the Geyser/Rain area procs a PBAE heal that makes for a quick healing splurge.
My biggest problem was trying to stay out of the line of fire while attacking. Trying to find proper places to place those ground AOEs was difficult due to line of sight over the ramparts, and most of the time I'd only get in one or two hits before the target moved out of my attack area, or I was forced back by ground fire. Any tips on how to provide better contribution taking down the attackers?