In agreement with others, I'd also strongly recommend blu; the diversity of traits and spells really makes the job highly adaptable to whatever content you are working on. Blu is in particular my go-to for Salvage and Nyzul (should you need that for mythic progression). Subduction is a fast casting, low mp aoe spell that makes the wonton slaughter of mobs in those areas so much easier. In addition, blu has access to the Carmine set (new version of crimson set) that includes a +18% movement on the +1 legs. You will likely find it highly useful for a wide range of content, especially if you want to solo or low-man.
"We are Dragoons, and to make short work of foppish cavalry is our bread and butter."
-Bob Shaftoe, The System of the World