I wanted to recruit some Samnitici Milites in my Romani campaign.

Their unit card asks a level 4 MIC (C). But what I don't get is what kind of MIC do I build?

The Auxiliarii one, or the standard one? Since Samnitici are not standard units, I've built the highest auxiliari compound I could have in that area. (3) Ign...

Do I need to change the gov of Capua from a 1 to a 4 or something like that?

Do I just need to build a standard MIC up to 4?