What about this new civ Idea?
Folwark instead of Mill (Poles)
Farm Upgrades Free (Franks)
Eco Tech Upgrades available one age Earlier (Burgundians)
Farm Upgrades provide 100 % more Food (Sicilians)
Farms cost 40 % less (Teutons)
Whenever you need food you just can delete some farms around your folwark and build them new. Even in feudal you will get 57.5 food instantly for a 36 w (+ 15s) investment. In castle age it’s already 92.5 f.
Strat with this civ should be to build up an insane eco while making trash units to defend and herass the opponent (with scouts/light cav). Because Food is so insanely cheap with this civ it can be used to “buy the way up” in the opposite direction than usual. Only at later stages of the game it’s reasonable to go to gold to make a big push with the eco lead gained (Most likely just some siege + hussar. Siege mostly just to make some openings for the light cav to get in.)
Tech tree could be berbers: Crop rotation, all blacksmith upgrades, FU Hussar, FU Bombard Cannon. Also only missing parthian Tactics. Only thing that is “missing” ist the Halberdier but at this stage of the game the civ should have such a big eco lead that this doesn’t matter. Also the UU choice + techs makes up for missing that upgrade: Camel Archer. The only possible weaknesses of that civ could be halb, heavy cav and other cav archers. The Camel Archer as UU addition can deal with all of this.
UTs: Silk Armor + Recurve Bow
Silk Armor gives a bonus to both the scout line and the camel archers aswell, Recurve bow makes the camel archers just totally OP. They can stay out of danger while having insanely high damage output. Exactly what you want from these costly units. If you want to take any damage you want your trash to soak it, so everyting that keeps your gold unit out of danger is just ideal.
(Need to mention because of the type of comp you aim for in the end, you don’t want to overboom with that civ. About 100 vills can easily sustain all kind of production while you should try to keep the camel archer ball alive. Because of that insane endgame with that civ it’s better to make enough military at each stage of the game than beeing too greedy with the eco and possibly lose against some good raids of the opponent.)