So uhh quick question about buildings is it a good idea to just build all the basic ones(right now armory, temple, constable) in every province or is that a inefficient use of resources and I should just focus on some high value core provinces?
You wont have the money to build all the stuff right away anyway, but I do prefer building constables almost everywhere since its a steady stream of income over time, but you could easily do the math since it tells you how much it will make for you. My best province made me 2,70/year more with the constable, meaning it will pay for the 50 gold investment within 20 years. If the province only gives 0,5/ year, the investment will still pay for itself after 100 years.
Armories however dont really "pay" for itself and are only of use if you plan on recruiting fast from those provinces (borders especially), so those might be worth it on border regions with long fought wars.