Shinano is a great ship with 4 100+ engies. Speed is 39, and you can either sit back and snipe behind Equal ships or rush. If you rush you better be able to aim. Dont rush with 2 BB's in your range though. It can take 3 good salvos without sinking, 2 if perfect. I normally just wait for the enemy BB to make a mistake. A 40-60k salvo will change a lot of minds lol. If you dont land a salvo at 45 degrees on a UK ship then use AP. Anything less than 43-45 degrees and you will bounce your shells.
P.S. I wouldnt use Shinano without 103 gunners. The level 100 guns are meh.