One of the hardest parts of civ4 multiplayer is the timing for an offensive war. Most games are won or lost on this and people mess this up constantly. The timing on the first attack was triggered by me seeing Xist having 1 axe defending and going to Aetryn "heh finish that skirm in queue and push and see what happens". 1 axe in an exposed intrusive city position is too good to pass up as long as forces are available.
The timing here is basically either you succeed in taking / razing & replacing or you are stuck with it there until cats / crossbows. At that point it will be a much more involved effort. It was almost certainly settled to seal you off from that valley which shows some negative intent toward you. It allows attacks from another vector and threatens an additional city with attack and it controls vision of the entire area. It also is of course a very good city and will either be producing for you or Xist. This will not be a 20 turn offensive war. This will be a 3 turn offensive war. Xist will come after you eventually. Even if he wants to be peaceful eventually you will start looking too strong to ignore. The other nice thing about this offensive war would be you haven't expended much resources on it. Basically 1 whip, 1 chop, and not having a lighthouse done in Humility. I'm not saying it works and I'm aware sunk cost fallacy is a thing, but all you would be expending by at least seeing what the defenses are is 2-5 turns out of borders maintenance cost. There is high upside for just taking a peak and if its too heavily defended you will pay less.
I'm going to address your points real fast some in relation to this situation and some in a more general thoughts.
1) One of the reasons I like expanding like a banshee is that it is much easier to defend than attack at this stage of game, so getting key city sites. Not really applicable here other than that maybe we both should have wanted to stay at war until we got the first time around.
2) I agree, but again you won't be spending much on this attempt and long term it means 1 good city less of praet production, which will massively help your economy going forward. Also, you will probably free up some unit upkeep! (again if it looks too risky just turn around)
3) That city sucks for your defense as stated previously. The location threatens multiple attack vectors and the vision is very good.
4) One can hope!
The timing here is basically either you succeed in taking / razing & replacing or you are stuck with it there until cats / crossbows. At that point it will be a much more involved effort. It was almost certainly settled to seal you off from that valley which shows some negative intent toward you. It allows attacks from another vector and threatens an additional city with attack and it controls vision of the entire area. It also is of course a very good city and will either be producing for you or Xist. This will not be a 20 turn offensive war. This will be a 3 turn offensive war. Xist will come after you eventually. Even if he wants to be peaceful eventually you will start looking too strong to ignore. The other nice thing about this offensive war would be you haven't expended much resources on it. Basically 1 whip, 1 chop, and not having a lighthouse done in Humility. I'm not saying it works and I'm aware sunk cost fallacy is a thing, but all you would be expending by at least seeing what the defenses are is 2-5 turns out of borders maintenance cost. There is high upside for just taking a peak and if its too heavily defended you will pay less.
I'm going to address your points real fast some in relation to this situation and some in a more general thoughts.
1) One of the reasons I like expanding like a banshee is that it is much easier to defend than attack at this stage of game, so getting key city sites. Not really applicable here other than that maybe we both should have wanted to stay at war until we got the first time around.
2) I agree, but again you won't be spending much on this attempt and long term it means 1 good city less of praet production, which will massively help your economy going forward. Also, you will probably free up some unit upkeep! (again if it looks too risky just turn around)
3) That city sucks for your defense as stated previously. The location threatens multiple attack vectors and the vision is very good.
4) One can hope!