well I see in game most people using a yamato with it's maximum speed of 38-40
knots. it is because of its armor and support troops. the best way to make a yamato
usefull is for me;
- at the AA slots you need 2 rep.s(why not AA? because emden,omaha and that kind
of ships do AA for credit in game and those are enough I think...)
-you need 6 engys. the more there are engys, the more you can go at maximum
speed.
- you need a chief seaman( so he can give your support sailors more effect)
- you need only 1 restorer(1 is enough)
-and the rest on the ground must be reps(yes you need 1 scout, but I ment the rest
of the empty places when there is a scout)

this part is for people who can really play with a yamato

you don't need to put any deck armor on it,55 bulge is enough. if you put deck on it
then you will reduce your speed.the faster you go,the more effect you can do on
enemy ships.

I would reccomend you to try this configuration. you will see it to that this config.
really works.

Have fun!..