We can get a 1T WB with 6 OF from the settler (if working lake, as little as 4 OF if we work a forest for 1T). Can skip Hunting now in favor of TW for axes which also takes care of the city connection.
Just scribbled this out on paper so i could be wrong, but it looks like chop then copper mine gives 7T settler but 2T WB (also saves 1 worker turn but loses 9H into settler from delayed mine). Copper then chop gives 8T settler and plenty of OF to finish the boat in 1T. Fish would get netted on the same turn either way. I think the settler will beat the boat by 4 or 5 turns due to the 5T of travel for the boat.
Is there any sense in squeezing the boat in earlier? With a 3c tile to work, the 2nd city shouldn't actually cost us anything. That's the same as a trade route + 1c tile which is what you are normally looking for with a 2nd city anyway. I think break-even BPT will be the same so the issue should mostly come down to which yields more food, right? That should favor squeezing in the boat even if slows the settler down 2T.