I am a healer main, I love being one, and it gives me a certain perspective on being able to see how helpful DPSs are. In my opinion, any DPS is 'good enough' in damages and I will not bash them in that regard (even though WHM can at times out AOE certain jobs). However, it feels like RDM out-performs in every manner, even being able to resurrect allies, something that made a certain supportive job appealing. The thing is, Red Mage simply is able to replace any caster DPS due to the fact that it has it all: Burst damage, long combos for sustainable damage, multiple mobility abilities, and even the ability to resurrect. Objectively, it is a good job and makes dungeons easier. Subjectively, it is a blight for the game because it makes other DPS jobs unable to compare.