The argument"MCH/Bard have utility so their damage should be lower"

[Aiselia]

I have already posted counter arguments

Which is why I used the adjective "legitimate".

There's a difference between "Top DPS" and "Comparable so we're not a drain in the 95% of the game that doesn't require a TP/MP battery."

Until you understand that, you won't be making any legitimate counter-arguments.