Thaumaturge, The Elemental Artillery Class

When you need someone to blow up a target with flames, frost, or downright shocking results, it's time to call in a Thaumaturge. They don't really wear much in terms of armor or protection, so they may need some guarding. But give them time to chant a spell or two, and they'll clear a path through anything!

In-game description of Thaumaturge.

"Thaumaturges are trained up in Ul'dah, so I'll have to check there to learn more about them..." - Jojoreza