Unlike other jobs, Blue Mage must select which spells and job traits to go into battle with via the magic menu → set spells. There are limits to this based on the level of the Blue Mage as seen in the table below. Blue Magic Set Points Lvl. Points Spell Set Limit 1~10 10 6 ...
Really a THF piece in my opinion, but if you have it already or can get it easily, go for it. I'd personally never bother trying to get it; there are several other pieces of the same set that I'd much rather have. Lv.75 ~Denali Gamashes ...