I'm currently using it for Blue Mage and it's definatly a good blade.
When I went to kill Ifrit Prime, I had only a SMN but unfortunatly we died several times. We then decided to try BLU70/WHM35, MNK75/NIN37 and WHM75/BLM37
and died once then succeeded the next attempt. As you can see, it was a rather hard fight for us but we killed him in the end.
Seeing as I'm a Tarutaru, the extra attack really helps.
I'd recommend it to any BLU65+.
Livi
BLU70