I don't think anything is wrong with the way blue mage learns. I think the fault lies with the players who wants 70's to speed up fights. 4 and 4 strat is soft, and wouldn't even be a problem of people leaving if everyone just went Blu in the first place.

Funny thing is people go 4 regular jobs and 4 blue Jobs and say it's to speed up the fight when in actuality it's slower cause after the 4 learn you still gotta get rnJesus again. And who knows when that will happen while the blue party of 8 have all learned and moved on.