The fact is, is that if we had from 2.0 and so on an only healer - AST, and now in heavensward SCH and WHM were added.. People would be calling SCH and WHM overpowered. Because they are overpowered compared to AST, and actually quite ridiculously overpowered.. Like fey wind is a better and more reliable DPS boost for a team than arrow or balance, and those take ridiculous time of shuffling and drawing to prepare for.

Not calling for nerfs of course, just sch and whm are superior to ast.