Going to add to this since people think blu has "Trade offs" and can't "do everything at once".
Here's a video of a person being a healer, tank, DD, aoe sleeper, and self buffer(capping his own magic haste) ALL AT THE SAME TIME:
https://www.youtube.com/watch?v=fxg-rim38uk
No trade offs. He is doing nearly everything in the game at once.
Giving blue mage so many innate shadows(yes blink isn't as good as utsu but good enough) is disgusting, honestly.