You can class them at lvl 62 however since no BB at this level range besides the PBB has a good AA battery i'd wait till Yamato.

The Main gunners should be classed on time.

You need 8 supports for the BB6 so get 4 repeirers and 4 engies.

If i were you i'd use a seaman with High Restore/Repair/Fighter.
I'm not sure but some say "Potential" also has some impact on seaman performance.

AAW does NOT work.

Get at least 6 pilots of any kind for the CV (preferably Fighters o DBs)
5 fighters 3 DBs should work too. 

Just keep them as armamanet till 89; this way you can use them as HH gunners till unlocking something with a great AA battery (or even then continue with HHs...)

I classed mine at 75ish, now BVE they are pretty good. Depends on the person, some class way past.

Honestly, there is no reason to class before 89/yamato, unless you get the PBB.

For CV:

Remember, you are limited to 8 pilots. I run my cv 4fp/4db and it works pretty good. I also have 4 low level dbs if i ever want to just mess around...

It depends on what you want to do. 5/3 good for fighter cover, people do use 8/0 for fighter whore. I use 4/4 because i can just do both when the need arises.

I use 4/4 + elite fighter seaman + IJN AA on my CV.

Try getting a +12 ftr for your seaman, if he has +12 ftr and some ++ restore or repair, even better, because it is very hard hitting 900 SD with CV. My cv crew is all lvl~100 and i dont have 900.

ah oke but i can class those armenant sailors into aa gunners should i wait untill lvl 89 and class them aa gunner then dp gunner ? and how about chief dp gunner ?

ah oke well i can try to get a seaman with those stats buts its really hard to get +12 atleast im having a tough time though lol

You can class them directly to Cheaf DP gunner at lvl 62 and they should do fine with BVE.
However since early IJN BBs have VERY bad AA slots untill Yamato (lvl 89) it's suggested to wait with classing them till you get it.

However if you want to AA before you get to Yamato then you can feel free to class them at lvl 62 since the added crew gain compensates for the ability growth loss.
They will be a bit heavier in the end but it's not a huge gamebreaking ammount that will ruin the entire crew.

Also you might want a seaman with high Repair/Engine/Fighter so you could use it on both CV and BB6 

No, they gain much more ability if you leave them as arm sailors, and the crew difference will not make up for it.

by 89 for +11 no boost:

Cheif DP classed at 62 will have 1187 acc and rld

Arm sailor classed to Cheif at 92 will have 1532 acc and rld

Point is, the longer you leave them arm gunners, the better it will be later. Its like wine.

ah oke well i will leave them armenant sailors untill i have reached yamato lvl

i do have a sailor with +12 in bomber so should i lvl him up to be a db ?

Yeah take DBs and know that you shouldn't auto DB ships while flying from South west since it will most certainly miss.

Also TBs in their current state are nearly useless compared to DBs. 

just a quick update

i now have a lvl 49 bo that can use cv hosho but that one sucks bad so ill grind to cv2

my pilots are lvl 47 all 5 of them currently

my second bo is lvl 54 so im 5 lvls away from bb kongo

i currently have 2 1st repair and 2 engine sailors plus a recon pilot lvl 50

gunners are lvl 54 and armenant sailors are lvl 53

when i get to the fuso bb i will lvl up a third bo to lvl new repair and engine sailors aswell as some DB pilots

and i find divebombing alot of fun but the exp i get for winning is so small that i get more exp for using guns, credits wise i get alot even when i lose :P