^ My main concern is those Cuirassiers still, we can't very favorably touch his C2 Cuirassiers with anything even on defense (no iron for pikes either) and he already has a dozen to throw in our face. So his first attackers would have over 50% odds pretty much whatever we do, which usually isn't a good thing. We could always bum rush but we'd want at least 5+ Cats for that so it wouldn't be that hammer effective either. He isn't such a tech monster any more in comparison to be honest, I think the war served its original purpose.
Whether to pursue getting St. Pete's monster shrine and Moscows wonders is another issue. He'll have crazy (albeit narrow) culture on us with Sistine. This could be done with a concentrated committment. The question is whether it's easier to do that now or later. To be honest I'm not sure with this variant as stuff like Rifling date is a crapshoot. Maybe it's indeed the lowest risk to make the big committment now with Jumbos against Kurasääris but I can't really give an informed opinion about that.
So at this point either way is fine by me, really. If we continue the war we do need to concentrate on the war almost 100% (sorry, I didn't do that at all towards the end of my turnset), among other things delaying GPs and all but the most essential Banks among other things. I'm usually very cautious about that sort of thing and would never do that solo but with this team we could do it.
The relations is a non-issue as pointed out, we only care about SB and Sury here and our Russian wars have no real effect on either.