Pretty good quick little guide!
My only suggestion at first glance would be for when you do your 4th job advancement ignore Rapid Fire. You'll only be using it when you're out of your battleship, which should be as little as possible.
So 1 Battleship, 1 Battleship Cannon, and 1 Battleship Torpedo would be my suggestion.
I'm also planning on doing a rather in depth guide at some point, so if yah have any suggestions or questions let me know :D