As KM armament sailors do not lose reload when you class them as AA gunners, there is no need to delay them. Infact, since they actually gain some reload it is advisable to class them into AA as soon as it becomes available.
I believe that you should also class your planesman as soon as possible. When to class sonarmen is based on your own opinion of two common opinions, either class him on time to maximise his sonarman ability or delay the promotion for as long as you feel you can so the sonarman provides more support ability (repair and restore). Some people wait as long as 90 to class their sonarmen, some class them at lvl 16. It's up to you.
The torpedo ability cap is roughly 1m TA, I believe. An EBVE torpedo man would cap at lvl 54 and anything worse than that would cap later, possible as late as lvl 80-90. Sounds to me like you should be classing your torpedo man ontime aswell.