You pretty much contradicted yourself here. Earlier you made a post stating the exact reasons why Scholars do not cry about shields. It's because our gameplay comes from a combination of the fairie, mitigation and DoTs.
White Mage, on the other hand, does not really have anything else going for it. So when a competing job gets buffed, they have every right to be worried. For the billionth time, it is not advantageous to have extra healing power when the game simply does not require it.
Everything can be made viable, but there is no doubt that d.AST/SCH is going to be the best composition in 3.4.