1. What do we have to offer France? Good point. I suppose wooden shoes won't get it done.
2. I think there's a number of assumptions here that I don't necessarily agree with.
First, you assume that we want to make peace with Ragnar at any point. I would think that once we get a steamroller going we will want to try to eliminate him entirely. That would let us possibly keep a few Viking cities rather than raze/replace them all (which we will have to do a fair amount of anyway), and I don't see where we get the settlers that quickly. Granted, we may want to make a peace (even a false peace?) with him once he's off our main island and confined to the tundra. But even then we will more or less need to raze/replace everything anyway.
Second (and I don't have the save/CA2 from memory, so please tell me if I'm talking out my butt here), does he currently have Astronomy? I don't think he does. IIRC, he's on par with us technology wise--which means that it's entirely possible that he gets Chemistry before Astronomy. Either way, though, I'm content--if he gets Astronomy, that will lower our research time further. If he gets Chemistry, he's likely to trade it for Astronomy, and that would be best of all for us. The ONLY way I see dropping out benefiting us a great is if he specifically gets Astronomy, and NOT Chemistry, by the time we want to make peace with him.
Further, for all of our near-island conquests, we're going to need significantly more naval power than we have right now. We can safely kill Persia with four units (possibly two with a kind RNG, but not necessarily), which was my plan and the reason we have two galleys in the general area (one to pick up two troops from Hamadan, the other in the south to pick up General Buce and another unit). We definitely can NOT kill Portugal without significantly more units than that. I'd guess that we probably need a half-dozen artillery and about ten units (remember,
we can't take our armies over there at all, unless we want to wait until Navigation and galleons--and I can safely say that's a dumb idea) to do the job right. Less is doable, but will entail significant risk and will likely result in more lost units than we want. That means either eight galleys or five caravels. Five caravels is less shields than eight galleys, they move faster (allowing for a more useful switch), and they are far less susceptible to unfortunate wartime incidents. Which means that we need Astronomy BEFORE we get the Viking peace--assuming we do want to off Portugal while we're down that way, and I can't conceive of a good reason why we should not.
And don't worry, I'm not taking any of this personally. I'm just so far unpersuaded that switching NOW is a good idea. (Point conceded that it probably would have been better to do Chemistry from the get-go--but that is a different question.)
Basically, forget the fact that we have put beakers in. We can either research Astronomy right now in roughly 9 turns, or Chemistry in roughly 15, if I have my numbers right, at our present research rate. Or we can try to trade for either of these, or beat them out of someone. (But anything we are going to beat out of the AI is going to take a while, because we are going to have to DOW and make peace, and I don't see that happening with the Vikings in the next TWO turnsets--by which time we are close to having both of those techs.)
I do want additional opinions on this. Even though ones that disagree with mine are wrong.
On another note, what's the team's thoughts about gifting/retaking cities? Exploit, or good clean fun? That would be a fine way to beat up France for a tech or two if we want to take that route.