RDM was the only mage job you would see in parties in ToAU as they could adequately and extremely efficiently heal a 6 man, haste it, and keep themselves refreshed, without ever stopping. SMN was ok but unless they wanted to nuke their mana on Hastega every few minutes, ignored. WHM was ok too, but required at least a 2-3 MP per tic gear set to even start to keep up and not cause downtime in the high chain 200-500+ parties. BLM was left to gather dust in a corner while sucking it's thumb (however BLM manaburns were awesome in Mount Zhayolm, specially on my Suicide BRD). BLU was very meh, not enough people knew the job well enough though.
I didn't even have to flag up on my RDM, as within about 10 seconds of logging in I had people bidding to make me join their BEST TP PARTY I WILL EVER JOIN!!!