As the build said I take inspiration from the Red Mage. A master of both black and white magic with swordplay but is not the master of any. I think that the Elementis is perfect for somthing like that as there and easily switch between doing damage, heal, take damage and control the battleful. From the sound of it, there made the Elements to be able to do all of that at the same time. Will with people often choose to focus on one of the elements.
For my Specs to go with Arcane since it wants you to switch between them and the Weaver because it adds more abilities to my mine skills. As for gear, I went with a sword, since its base of the Red Mage and a Focus for support but I'm not fixed on either of those weapons as I don't really know what weapon allow the most utility out of all of them. As for gear, It's all Celestial since my build is all about balances but it's not set in stone if you think there another gear type that would fit into this. For my skill bar, I would most likely go with glyphs and Arcane since there change with what element you are. Though I don't know which is more powerful or useful. You may have notich that I didn't say what is my third spec as I like to have it be able to switch out for what fits what is needed. With all that siad, I would like to hear you thought about them and any tips for a new Elementalist. Here my build with each element and what traits I have and what you think are better traits.
Fire for when I just need to deal out much damage.
Air for when I need to be on the move a lot during battle and deal quick stong damage.
Earth for when I need to be tough for damages you just can't avoid
Water for when I and my allies need to be able to heal during battle