Good news and bad news.
Good news: We're to five cities while Jowy and Fenn are both still at three!
Bad news: Jowy, Agg with a probable barracks in Rivia, thinks I'm bluffing and don't actually have my city covered. Possibly related to the time he was able to kill an unguarded settler of mine
I withdrew the worker from the copper hill, left our warrior to collect a little more fortification bonus, and am walking another warrior to the front. Jowy won't even have odds on the first warrior, and we'll have two warriors to his one.
But...he might not know that. Or he might just be focused on delaying our copper hookup.
So what do we do from here? Partly it depends on whether Jowy actually attacks (and whether he reinforces). But I'm strongly tempted to go ahead and research Archery. We're still saving gold, but could get to Archery in three turns total. We can still hook up our backlines copper, given time to get a monument or barracks, border pop, and workers...or we can just push forward an archer to the hill and mine under that cover.
Jowy's got copper in his capital's third ring IIRC, so we might need that extra speed. Especially if he's thinking aggressively. Plus, archers would be a good supplement to defend our cities and resources - cheap but would get decent odds against even Agg axes.
Longer term? Well, if he didn't have copper at all, I'd be tempted to try our luck with an axe or two. But as it is, I suspect he can get a defense up before we can accomplish anything notable - so instead I want to stick with defense. Get some culture going in the border cities, keep a suitable garrison on hand (and some whipable pop), and focus on keeping the REX going.
For our culture, I'm torn. We probably shouldn't wait on religion for the border cities. That means some building. Monuments are cheapest, barracks have that nice advantage of catching up a bit to Jowy, or libraries are good long term. I don't think culture is more important than border granaries - whippable pop is a great defense - but it should probably come immediately afterward. I guess at the moment I'm thinking monuments for the border cities, because we need culture ASAP. But there's time to think yet.