Best Way to Gain Command Stars

[A Terribly Harmful Name]

Say that I have a promising young fellow, younger than twenty. He is Green, Sharp/Charismatic/Vigorous... Is there any way I can turn him into an epic commander? The ways I can think of are:

Commanding lots of battles - I did it, but most of my Veteran fellows only get a single or two command stars.
Building a Temple of War - No recognizable effects, though I had one of them get a hopeless case of anger that was quickly reversed. Don't know if Temple of War impacts it.
Studying in Academies: The more the better, it seems, though practical experience shows that generals will mostly become pedants and lovers of beauty, so it's not good at all for Command Stars. The "Practical" trait is a lot more useful, though.

Some Factional tools:

Spartan Agoge
Druidic Training
Etc... I don't know the rest.

So in sum, have you ever managed to get an epic general? How did you make it, and what are your recommendations?