kurgkurg
Conjurer
I have built as many manus, MWS, and armories as I could, you don't need to use them all. Actually, if you need seeds and unurium for research or upgrades, you may have those manus just for required culture and working pop, you don't need to use them all, only if you really need, then produce.The production of the building is not that important, just the pop/culture effect on the unurium production of the trader.
Btw, more armories are very good for the required culture, and a collection bonus is important.