The class's innate trait was Revenge, which when they got hit, could proc and give them a free BP. In addition, they could also learn the 'Turn Tables' and 'Eye for an Eye traits, which gave a free bp on dodge and and increased crit rate to the max when the RDM hit low health. I equipped mine with a Red Muleta to boost the rate she got attacked, equipped the counter centric SAM skill set, a sword for more frequent limit breaks, and Buff Up for constantly raising stats, as well as E4E and The cover trait where she'd take the hit for a weakened ally. It worked fairly well, especially when Revenge procced multiple times. Not a gamebreaker, but a style I certainly adored most. Admittedly, I looked at the fact it had Revenge, and started to work on a build based around getting the RDM hit as much as possible, so I suppose I did the best I could to make it a true tank? XD My party was RDM, Spiritmaster, NIN, and BLM.
Admittedly the idea started simply because I was curious if it was actually possible to make a mage job durable, and Revenge made RDM seem like the best candidate, but it worked fairly well, at least IMHO.
I avoided the game like a plague after what they did to RDM, honestly. XD Making it a refresh bot...
Someone understands my complaints!