I've just tried declaring war on Cathy in the first game Dooms posted and it results in him keeping keeping his entire stack together, and moving it to a tile when we can block him as expected, so it looks like this will work, and thee is no need to resort to revolting to paganism and gifting techs+gold to Ragnar which would set us back a very long way.
Edit: I've tested it with Doom's saves No2 and 3 as well, and the blocking plan works then as well, so I think we can go ahead with the original plan, with the modification that we declare war on T+1 instead of T+2.
The way I see it, declaring war on Ragnar and tying up two of our Triremes is far inferior to the original plan. Our original plan was to block him using 2-stacked Triremes and then leave only
a single Trireme there if he would be scared-off by it.
We now know that he would have been successfully scared off by a single Trireme, so
the current war-declaration plan does force us to commit a second Trireme to the task.
To me, that fact greatly reduces the appeal. I do not think that it is appropriate for the 1 remaining Trireme to guard our empire from both Joao and Barb Galleys from all sides, nor do I consider a Galley to be a defender.
As soon as our lone Trireme defender needs to respond to a threat, it will be out of position and unable to respond to a second threat. If we move to stop a Barb Galley, we could lose a City to Joao with there being absolutely nothing that we can do about it.
Galley-Galley war is a total coin toss at best, and absolutely useless if we need to ATTACK with a Galley in order to preserve a Netted Seafood Resource. We'd likely need to be on the attack, since the Galley's priority is going to be shuttling Workers around and not standing guard in the ideal location.
I REALLY do not feel comfortable with having 2 of our Triremes stuck on guard duty.
Getting 10 turns of Peace would be an ideal situation, given that we are 10 turns away from Slavery. How much more perfect could it get?
Therefore, is there any way that you can find out from your turnset what Ragnar's Attitude was at 0? Surely, you got logs when you uploaded the game, perhaps you have some manual saved games, maybe you can check your harddrive for an autolog, maybe you took screenshots of the F4 GLANCE screen, or perhaps you can search your mind's memory for the answer--you were watching the F4 screens, right?
If we can't know for certain, then I don't see how it is a waste to at least try.
Gifting Mysticism would be "too much" value relative to Gold gifts, which is another reason to favour the Gold gifts.
If we can get our Enforced Peace by gifting Alphabet and gifting increments of 10 Gold, then we can Demand up to 50 Gold back... and, if the team decides to do so, we can always sell Mysticism to Ragnar after some period of turns, as getting an Enforced Peace would mean that tech trading would still be possible, unlike in a war situation.
If we do eventually sell Mysticism, I'd prefer to wait to do it until Isabella
after learn another couple of techs, so that Ragnar will continue to hold the title of the most backwards AI without any threat of competition for that honour.
If you are unable to get us a data-point for when Ragnar's Attitude changed from Annoyed to Cautious (your logs might give us this info), then I still think it is worth gifting Alphabet plus bits of Gold... that's less than 60 Gold for Peace. WE WOULD PROBABLY HAVE TO PAY HIM GOLD TO END A WAR THAT WE DECLARED ANYWAY. So, given that the focus of declaring war is that "so that we can negotiate for Peace sooner without doing any fighting," which would cost us some Gold, where is the cost-savings with your war? There really isn't such a cost savings, or if there is, it is simply the difference between 60 Gold and the cost that we'd have to pay Ragnar. Except that having to commit 2 Triremes to guard duty is an additional cost that is far higher during our vulnerable time.
If Joao shows up with a stack of 2 or 3 Galleys, will we really win out if we're forced to switch into Slavery early just to survive? Would it have been worth saving 60 Gold at the cost of delaying our Great Person Generation, plus taking at least one additional turn of Anarchy when we'd switch out of Pacifism sometime after the end of our Golden Age? I don't see that equation being anywhere close to equal.
How is giving away Alphabet going to give away the game? Every other AI knows Alphabet. Therefore, Ragnar learning Alphabet does not actually enable any additional AI-AI tech trading. He can already trade with anyone simply because only ONE PLAYER in a tech-trading deal needs to know Alphabet.
On the other hand, giving Mysticism to Ragnar means that he can quickly pick up a couple of Religious techs using self-research, and getting those couple of extra techs is actually what WOULD bring him back into the tech-trading game.
It is NOT because he does not know Alphabet that he is the backwards AI who is not getting tech trades. That's confusing cause with effect. He is actually not getting tech trades BECAUSE he is the most-backwards AI. That's how you really need to look at the situation.
His tech priorities prevent him from self-teching Mysticism, but once he gets that tech, he becomes three tech-steps away from the tech that unlocks his Favourite Civic. So, yes, he will then be able to self-tech towards Monarchy and will do so... and on his way, will learn enough techs to vie for the "most backwards AI" crown title with Isabella. Once there is more than one "most backwards AI," then the game says that there "really isn't one" and tech trading resumes with all AIs getting involved. He still will not trade around Construction (which is unfortunate), but AI-AI tech trading will increase to all 6 AIs until a new "most backwards AI" can be crowned.
I'm sure that this info can be found on the forums if someone doubts my credibility enough to search for it.
As long as Ragnar is 4-steps away from Monarchy, then he has to get really, really, really lucky in the random-number-factor part of AI-tech-research in order to self-tech Mysticism, and until he gets a couple of more techs, no AI will trade with him. So, essentially, he is "locked out" of Monarchy until we fall for the trap of enabling him to research Monarchy by giving/trading him Mysticism.
If he becomes 3-steps-away from Monarchy (which he will be if were to gift/trade him Mysticism), then he'd be allowed to beeline Monarchy as soon as his current tech research task is completed.
To me, declaring war on Ragnar is a last-resort option (now that it requires us to commit 2 Triremes to the task) and I would vote to spend 5 turns in No State Religion above the choice to declare war. That cost seems to be a lot smaller than risking our empire's defenses to a lone Trireme.
Minimally, I'd like to see a majority out-vote me before we declare war on Ragnar.