Regarding this thread, I think white mage is fine where it's at....It is just like Dark Knight, Samurai and Black mage. Minimal party-utility but maximum raw healing output.

Dark knight has max single target mitigation...SAM has huge melee dps output, BLM has huge ranged dps output.

You can't expect every class to synergize. But if you just wanna have fun and clear content, go right ahead.