here's my thoughts...from the spot 1N of the plains hill, we can see the forests, the hill, ensuring that there are no barbs there. Pass a turn and move to 1NW and 1SW to move around the forested hill, that ensures that the two coastal grasslands are barb free and we place the worker on the forested hill, where it is safe for at least one turn regardless. next turn go SW twice to get around the corner and move the worker 1SW to reveal the jungle(if a barb in jungle continue SW to the corner where it can reboard the galley the following turn) and when it is shown as barb free, drop the settler that turn on the island where it is guaranteed safe as well. Next turn we finish moving the galley around the island and see it is barb free, thus, in the minimum number of turns we are already roading the iron and have the settler in the jungle ready to found Lodestone City.
Wow, that is clever. I like it! (Took me several minutes to work through it mentally and verify it would guarantee absolute protection against barbs) I actually did what you suggested in my turnset (about to upload it), with one alteration: I offloaded the settler first to the forested hill instead of the worker, allowing founding the city 1 turn earlier.