I've finally managed to acquire the ship I always wanted since starting the US BB line: The Iowa.
Now to figure out how to be actually good with it.
Well, following advise is based on my experience with the Iowa.
The grind to the Montana was rather short as it brings boatloads of money and credits which reduces the grind significantly.
The premium camo helps too and looks pretty stylish.
I play her like a big cruiser, constantly moving, changing speed and heading.
Don't make the mistake of tanking against BBs of same tier and higher.
While you can use this tactic against lower tier BBs, higher tier BBs will pen your front. Cruisers will burn you down and the superstructure of the Iowa is a big shoot me sign.
Not to mention, that if a sneaky DD manages to flank you, you will eat fish.
Use the Iowas speed and (relatively) good mobilty to weave between shots and bring your rear turret to bear.
Try to stay at around 15km after the initial exchange of long range shots.
Iowa and the Montana are exceptional Cruiser killers, so focus those first.
After the recent buff to their sigma, they punish broadsides and it doesn't matter what ship it is.
The last game i had in the Iowa was a citadel fest, sank a Yamato in three salvos.