Let's redefine "damage taxes"

[Reimmi]

And this logic fails due to not considering actual difficulty. MCH shouldn't be doing as much damage as a RDM, just like SMN. Also all rDPS numbers being within 1% of each other is not true balance

Difficulty is subjective.
I find redmage incredibly easy to play compared to mch, therefore by this logic i think red mage should do less damage than mch
This is a horrible balancing metric.