Hello Admiral, people always in doubt and confuse when try to fill the commander skill. They need the expert, the master and the specialist to recommend it.
See the example, download the psd (photoshop file) or TIFF (for non Photoshop user, and move the green as recommended skill point to fill.
PSD - TIFF
1. Edit the "FOR :" with ship type, tier or specific ship name. (Cruiser any Tier; Yamato only)
2. Allocation the Green box are recommendation skill. The Green box have number as the order to picking skill. Progressing to Level 20 (19 skill points) is a long way, people need recommendation which is earlier and which are later.
3. Use Red Box only for warning. Either for skill that useless or not helping at all to a certain ship types.
4. Explain your choice as specific skill mean specific gameplay.
This is just an example.