There are three spots where I would look at putting cities.
The first spot is to the north of your capital, 1 southwest of the gold. That would give you gold, rice, and cows in your BFC, and with only a little bit of overlap with your capital, and taking advantage of all that forest for production - and don't forget lumbermills at archery.
The second location is probably better to get after you grab bronze working, and that is south of your capital, 1 southeast of the bannana's. That would give you bannana, cow, 2 dye, and standing stones, with 1 square of overlap with your capital.
The third location is to the west of your capital, 1 north of the gold. This location would give you gold, corn, reagents, and the mirror of heaven, again, with 1 square overlap with your capital.
None of the locations that I said do well for specializing a city into a specific path. However, this early in the game, I generally feel that it is most important to grab commerce resources, as well as decent production and food. Usually it is more midgame that I start to specialize cities into specific paths, as early on, you can't afford to have a city with high production, but no commerce, as it will crash your economy. On the other hand, you also can't afford to have a city have lots of commerce, or lots of food, but no hammers, as it can't meaningfully add to your production for a long time, and you can't afford to have a city that is a drain on your defenses.
Now, if you want, there is one more option that I see available as plausible. 2 east and 1 south of the tomb of Sucellus would give you a city with little food (you would need some workers to chop and farm soon), but LOTS of hammers. This doesn't fit my bill as an ideal city, as it adds nothing to your commerce. But, with all those hammers, it gives you a second city that can quickly help you warrior spam to smash the sheim asap. Considering the closeness of your cities, it is a viable alternative. But, it will also significantly inhibit your early growth if you can't force out the warrior rush quickly. Due to the somewhat low production of your capital (its decent, if you work the copper, but not great), it isn't really a great idea to try to warrior rush from just there. Alternatively, you could settle the spot I just recommended, and have that city spam warriors while your capital spams workers and settlers to settle more quickly AND have defenses. Personally however, I would probably save that spot for a 5th city.
-Colin