Once I can build militia, is there any reason I'd bother with recruits anymore? Is there any need to retain my bronze weaponsmith, or should I pull it down to get the licence back and use the copper just for making tools?
I'm sure the same question could be asked again once I am able to build the next better type of unit. In general, is there any good reason for keeping a mixed army, or should you just recruit the best, and retain only the production needed for them?