EMS gets KAISER job 5 december

When we first got the special MMBS for jett, they did only offer nautilus. I held onto the book and they fixed it. Sounds like you got the same initial bug that we did. The other bug we had was that there was an event that gave out class-specific MMB and Jett would get a Hero MMB instead of a Jett MMB. They fixed that one eventually too. I haven't finished Neo City on my Jett, yet, so I will take the opportunity to see if it works. I am currently saving up Tempest coins to get him a Special MMB as well. I am hoping the previous fix is still working.

I'd say that's the best method since you only have one skill left to go. And if that book 30 works you saved yourself some Tempest coins!