Good question.
Currently I am working on the Hindenburg with a 17 point captain (with 2 unused points) and the following skills:
1. PT
2. EM, ER
3. SE, DE
4. CE
When I get 1 more point I will get: 3. Superintendent
And then for the final point: 1. PM
Seems like a generally balanced cruiser build, but wonder what others think?