Agree about oracle.
I've done tradition Korea 240 on a large islands map, standard settings no worker steal or any other grey area practices. I was in a tundra too (and someone beat me to the pantheon, so no religion). No river/mountain in capital. 100% peaceful.
Not quite archepelego, but I can't imagine it's that different.
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Why didn't you submit the game to the HoF? As it is now I have noone but myself to compete against for my science wins and I also don't see the proof of it unless it gets submitted.
But otherwise no, large island is kinda the same as archipelago if you skip the worker stealing. If you don't skip it it's easier...