AST will get a lot more viable once we are in Alex2. Simply because if they keep acc off the healer gear the whole DPS component will drop*. Granted a SCH will still have more utility and the better buffs and a WHM will still have better healing, but at least you don't hinder the other healer from DPSing.

*unless they keep the savage encounters as tight as they are now. In that case healer can fully expect to spend millions of Gil on crafted gear with acc melded into it