The being able to gear all 3 healers in one basic go might be one of the up and rising problems with people not getting use to the strength of the astrologian. Just healing as another job and having a fully geared out white mage then swap to another job and not having to invest the same time to gear up that job I find is a flaw in the design of the game. White mage is inherently easier because it is more straight forward and traditional then the astrologian and scholar which are not harder in specific just a bit more studying and learning to get it down over the straight forward approach of the white mage.