Greeks secularism victory strategy:
1. Bulb metal casting before turn 75 and buy alphabet, get ancient tech from Babylonians, monarchy from Persia(after peace), horseback riding from Carthage(can conquer Sur first), Oracle for currency.
2. Research masonry - iron working - math - aesthetics - calender - literature - construction - code of laws, then stay at classical era until 600 AD. Switch to republic - agrarianism - warrior code.
3. Complete conquest and wonder UHV. Capture Jerusalem ASAP, its gold really helps, and you can take Sur from there in 1 turn - no need to deal with their navy. Build an army of hoplites, catapults and horse archers.
4. Korinthos should build Statue of Zeus without ivory before you begin conquest.
5. Kill Romans by horse archer and swordsmen in number before they attack you, 4 horse archer and 2 swordsmen will do the job. When conqueror triggers, cease fire. Capture their core on the following turns. TIPS: Squat Milan by initial warrior - on the way back from Iberia hut. This way Romans will have one less city in their core.
6. Conquer Lahore and Mumbai too, try to capitulate Indians, get Buddhism for Shwedagon Paya.
7. Raise another army to conquer Dunhuang and a city in China to get Confucianism and Taoism, you can build the Grand Canal in Babylon later.
8. Don't get theology and build cottages all around, you can get tremendous gold this way, and early secularism allows all wonders. Either wait others to found Catholicism and convert, or build Paya to switch to secularism.
9. Counter Arabs with war elephants...Seljuks and Turks should be no threat either.
10. Beeline toward modern era...