I have not play FFXI so I dont have much idea about Blue mage play style, theory on paper doesn't make 1 understand the class anyway. But some thing I can say about the "book".

for BOOKS: nothing against neither nothing wrong to put a spell you learn into a book (unique, untradeable), and then later re-use it as it ll be only available for that char and for Blue Mage anyway

about Blue Mage: afaik Blue Mage use Fence (melee sword wep) no ? so why Blue Mage = THM + CNJ and not THM(?) + CNJ(?) + GLA(?) or GLA (15) + new job(30) ? and if Blue Mage = THM + CNJ, which is their main class ?