If you wanted a quick reference I'd look at something like
http://www.dbaol.com/armies.htm.
DBA is a minatures game where you play ancient/medieval armies, and that page links to lists of what sort of troops were part of which army.
For example a papal army is 1/3 knights, 1/4 spearmen, 1/4 crossbowmen, and a little bit of knights/dismounted knights and a few light troops. In DBA one unit of knights is probibly less "men" than a unit if skirmishers, but that army sounds big on spears, knights and bowmen.
So I'd make their special building give extra pikemen, knights and bowmen, and then less light cav, light inf, and heavy inf.
Similarly scotts highlands and Isles are all heavy and light inf, and I'd also give them less cav and archers.
