Sorry to say that AEF is a double-edged sword. It sounds great, but it has a good deal of range. For example, you could get SATCOM or satellite communications or Simpson 260 calibration school as a "C" school (sorry, not old enough to say B/school), which are about an extra 6 months or 2 days extra training after A/school, respectively.
I wouldn't try for a 6-month lease after A/school with your record... By the way, you could work out permanent shore duty with the first school.
ON THE OTHER HAND... (coin flip) I did see many other ratings cross over to the nuclear field, like a GS to MM; an AE to ET; and coner ET to real ET (Yes, I said it and I was a skimmer puke). So go bust butt and get the best of both worlds, it will probably be the only way.