Architect Archive

Im approaching my first line of being an architect.im not sure as to which line i should go? I want to go to factories so i can make better mineral havesters,but then my goal is to make the nice lvl 4 houses. Im so confused!!! someone tell me which line to go? and also wut does everyone make to gain their exp as architect? i been crafting mineral havesters and that seem to give pretty good exp, and house parts like structure thingers give about 500 exp per one. Im not sure hehe let me know pls