Don't go for an all elite crew.
IJN rep is horrible, and even with 130 vets on my elite reps they aren't that great.
If you go for a non-elite gunners, BO, and engies, restore ability and repair ability would
be better.
If you're newer to the game, go for UK. They are much easier to play.
As far as IJN engies/reps/gunners, I personally went 4/4/4.
My crew when I first got yamato years ago, before the speed and ammo buff.