None of the content is ever going to be balanced with PotD in mind; most especially low-end PotD.

My experience with red mage has been very different, though. Even synced to low levels in almost all content, the red mage's dualcast and enchanted rapier strikes have been extremely bursty and has further trivialized pre-50 content, including in Palace. Running with four red mages shouldn't be meaningfully different from running with four of any other dps class.

It's still way too early to say for certain, though. More input needed from the community at large before a baseline can really be established.