I'm yet to mention a number.

Again, it doesn't matter if you raise tank damage output, or you lower dps damage output, so long as the relative contributions of tanks increases in relation to dps players. It's your percentage contribution that determines the weighting of your actions. The lower the relative weighting, the less influence you have over the fight outcome. So in a world where you do significantly more damage than a tank, it means that you become much more important to the team's success. That may be convenient for you, but it doesn't suit us, black mage.

There is a balancing point at which both roles have something to contribute and be valued for.