May I suggest you try the following at Noble level.
Play Roman as Augustus.
Settle on spot. In capital, build a worker -> warrior -> stonehedge -> great wall -> warrior -> settler -> pyramids -> warrior -> settler -> (switch to police state) -> preatorians.
1st settlement should have some resources and fresh water (but no big deal if not) and should be built near an AI, build worker -> barracks -> worker -> preatorians.
2nd settlement should have iron unless you already have it in other cities, build barracks -> worker -> preatorians.
Research order = bronze working -> mysticism -> mining -> masonry -> ironworking -> pottery -> writing -> polytheism -> priesthood -> code of laws -> alphebet (slip in some resouce techs inbetween depending on what you have).
Give all preatorians city raider I promotions, when you have around 10 (and maybe a couple of axeman, march them to the nearest AI (hopefully not protective ), get all its cities except the last one (you should capture its capital though). The 1st captured city goes barracks -> preatorians, the other captured cities get courthouses first.
Auto all workers (except when you get your iron city, at that stage, hook up iron fast), auto all worked city tiles, auto citizens. When AI has 1 city remaining, sue for peace and take any techs that AI has to offer. Switch to representation. After 10 turns, declare war again and finish him off.
By then, you should have around 7-9 cities, each with courthouses and library. Your research % should be very low but no problem. Build some workers (auto them), trade for currency tech if you do not have it. If no one is willing to trade you currency, switch your capital to build Research and research it yourself. Spam markets. Spam more workers till you have around 10+. If you are in dire financial trouble, disband some of your army (esp the initial warriors you have at the beginning).
Settle all great people in capital unless you (1) use him to found a shrine (2) save him to rush a wonder (3) set up an academy in capital. Try to get the Great Library in capital.
Research feudalism, make some longbows and put them at your border city. Then get Education and build universities (Oxford at capital). Beeline liberalism. Get Nationalism as free tech. Try to build Taj Mahal for golden age, then research towards rifles. Once you have rifles, switch research to 0%, use the money to upgrade your preatorians to rifles, draft some more rifles, make more rifles and go for the next AI (which should only have macemen and longbowmen). Capture his cities (incl. capital) until he capitulates. Then find your next victim, rinse and repeat.
The techs you need after you get rifles is probably drama, then constitution (both of which to mitigate ww), and then either goes for democracy if other AIs have that (which is unlikely) or beeline assembly lines + facism. I would suggest that you ignore the astronomy tech line, the railroad tech line and the scientific method tech line until after you get facism to ensure you have infantry as soon as possible. Also ignore military science and military tradition.
That should be a guaranteed success strategy for Noble level and should work on most non-island maps. There are actually a LOT of things wrong with this way oversimplified strategy but it should have no problem on Noble level. Roman UU are really overpowered. I hope you get a good win out of this and kick your gf from her number 1 spot in HoF.
