I played this to liberalism with BW and got there around 1050 AD. I knew about isolated and the goal on this map so i also wanted to have a religion. However a gambit for Buddhism without myst is a bit much imo.
I went myst->poly->masonry->mono, missed hindu by a mile (would have got buddhism btw) but managed judaism. Still a gambit but not as big as buddishm. Things were slow from there on, missed Parthenon, built GL (shouldn't have done that maybe). Got Tao with a bulb and managed to get to lib first trading for the missing stuff like MC/compass with Han.
I'm not going to play it further, if no one declares on me and no one launches anything from here i think i can manage cultural victory around the same time as Brennus did. I have 2 religions instead of one (so i can build 2 extra cathedrals) but no Parthenon, guess that evens out more or less.
Personally i don't believe in the no BW gambit, even isolated i was able to trade for the prereqs for the lib bulb and that's always the case in my experience. Going buddhism and doing that oracle gambit will not work most of the time, getting aest that early helped a lot (Parthenon).
Then again i whipped quite a bit of stuff, Brennus must have played well to get all the infra up without it

, don't think it has to do with delaying BW though

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