I agree on the movement increasing talent and stand and fight; also on siege expert. They just leave room for stealthy, for the ability to fight night battles. This can really help in the later game if you face multiple stacks. A ninja can achieve the same result, by sabotaging the army but they are not always available nor successful, and sometimes even if successful, sabotaging the army does not stop it reinforcing.

Now I have settled on the above, I find it very hard to justify any other build. However, I did try a pirate/admiral for my navy - getting a cannon bune meant it felt a bit redundant though.