I'm not sure what it was like in 11 since I never did that but in 14 its pretty much keeping black/white mana near equal and when you get over 80 of each you dash in for your melee combo and then get out and repeat. But yeah Blue Mage is in the game but its as a limited job where it more or less is not the current max level.
And off the top of my head I don't think there are many jungle areas... Parts of La Noscea? Rak'tika Greatwood are really all that come to my mind.