white mage

I've been playing a black mage build until recently and decided to try a white mage build. Any suggestions? I'm trying to go for more of a battle healer or a "salamander warrior" build though I'm not sure what salamander means (started playing only a while ago and saw this term in some suggestions).

They can't be changed right? Been agonizing over which one to use on my White Mage...

So I'm building my character as a paladin-esque white mage. Thought about starting out as white mage for the histories, mostly acolyte, and getting all the skills then swapping to warrior, mostly for the veteran class perk. I tried this out at one point and went through the centaur village...