We should say we need the marble for Taj and can ask how long they need it, 1 or 2 turns is not the great difference. Our advantage from GA is bigger if later (more citizens if we don't whip to much).
Trystero
Ama has no value from eliminating Mer/Mav. They 've their gain and build their empire.
CDZ and Quat has their own agenda to win the game, we should also make a plan.
There is the difference in civs (in future)
Ama is persian and had they uu, the ub is not so bad, but also not good
CDZ is viking, they 've their uu now, the advantage from the ub is allways good: navi-1 promotion.
Quat is Carthag, they had no advantage of their uu, they get allways the additional TW from their ub, and because they are crea, they get cheaper promotion
We 've now a great advantage from the uu and when we get to our ub, and don't lost we should win automatically. Look at the map and our towns and reckon the advantage, there is no possibility 1 other can win again us. We must prepare not to go to chem without quick to steam, because with chem we lost our maritime advantage (frigates are better than EI), all (our allies) 've then the same best military units.
That above know all, you also, it's not my secret. So if we think about our future, that's the hard facts