Final Fantasy Hacktics

Since you cannot de-level with degenerator trap in KO--would the highest magic attack mage still be achieved by leveling with mime, or would it actually be better to skip all those levels gunning for mime in non-mage jobs, and just use the jobs that (supposedly) have better magic attack divisors?

I did check some jobs in FFTpatcher, and i think chemist has 45 instead of 50, but jobs are repeated and i'm too noob to know for 100% certainty, which jobs are the correct ones to take growths from.