I think for settling priority:
1. Iceball
2. The best island city, fish+clam+copper+corn on the only fogged tile.
3. The other city on that island
4. 2x banana site
5. Pig+sugar
6. Rice closest to core
7. Rest of the islands and the filler city with dye, maybe filler cities north too.
Some problems here.
First, we need to send a worker to scrub the site, for any city. If on our landmass better road first, to speed the settler.
This is particularly true for the islands. If our chosen sites are fallouted, we need to scrub them first. In any case, it's a pretty long trip, and I'm thinking to some creative ways to do so...
Maybe a worker/settler for the closer site, then a worker for the 2nd and an archer for the first, finally archer+settler for the 2nd.
But let's see the priorities.
We lack health and banana give +1.
Same for sheeps.
So, i'd change your proposed order:
1 (1). Iceball
2 (4). 2x banana site
3 (3). The Sheep city, on the closest island. (The other city on that island)
4 (5). Pig+sugar
5 (n). The one in the far island, near spices
6 (2). The best island city, fish+clam+copper+corn on the only fogged tile.
then i don't care, we can see later
5 and 6 can interchange, not a problem. What i really care are 1, 2 and 3.