Just checked, REV off. Eternity game speed. Difficulty, somewhere easy-ish. Probably Warlord or Prince. (but normally I don't get so much money in Vanilla BTS lol) Although, notably I have terrible micromanagement skills (and there's no worker automation) so my land isn't completely developed.
Tech lead + lots of money allows me to buy all the wonders as I unlock them, increasing this money lead. (Earlier, when I didn't get so much money, I rushed wonders with Treasure, as I had two city ruins in my borders.) I get so many Great Merchants that it's not even funny; I just get a few more techs with them. (Actually at this point I'm basically using all of my GP for more techs, save scientists for academies, doctors for health spas, and prophets for shrines).
I don't maintain much of an army except for this outpost in another continent (where I have ~200 rifles), because my main continent is just my vassal and myself.
Running on 100% tech by the way, with about ~10 cities running Research (none on Wealth). Funnily enough, mostly didn't build Gambling/Assassin/Pirate stuff after I saw the crime boost those give.
Also, it's now Industrial at 411 BC. Hmmm. Timeline might be off, but that's not a balance issue.