White mage is the better healer...

[MirajaneStrauss]

I don't think she meant it literally obviously two SCH and do it just like two WHM can do it the point was just to defend her job when it comes to Coil.

There's no defending needed. WHM and SCH comp is bar none far better than 2WHM or 2SCH.

The issue is, if you weigh the pros and cons of each class.. SCH is just.. well better.