First I would say that you can expect the AI to be cash poor for the early game. It is not till they get contacts that a few will have the money.
Second, I would never make a cash gift, to anyone not weak and likely to stay that way as I do not want to fuel their empire. If you must give a cash gift, 10 is enough. You cannot buy friends here.
Either you get strong and they do not like that or your die and you do not like that.
Third forget Map, you cannot afford it. Yes I know this is an island map, now I do anyway. You need Lit and to clear the island.
Fourth you now know you cannot trade Alpha, till you already have Writing at the earliest. Exceptions, is if you know someone else know Alpha. Check the F11.
You got a hard roll of the dice to run into Xerxes so close. You can be sure he will demand Alpha or cash and you will have to fight. This will be harsh at first, you need to get a leader or at least some elites.
You do not need Iron, you need Horses. One of the dangers is you must ignore the needed techs and race for Philo and hope nothing ugly happens (attacks), right away.
The way I do it is min research on Writing as it will not matter how much I put into it for many turns and I want to hoard some gold. Now go all out on Writing and Philo and use the gold to pay the bills. You may be able increase research on Writing after you get some towns up.
Now I hope to get a leader out of any fighting that takes place and fill it if I need to to kill off a neighbor. If alone them not fill it till I can invade.
Note you will need to get some towns up in size and one problem is without Masonry, you have no real good prebuild. You will need to have worker on hand as you get close to learning Philo.
You want to have them mine as many tiles as need and be added into the town to get max shields. You have the extra food to allow a specialist, if needed. Once you have Lit, put as many pop to work as you can, use lux slider to allow max shield.
Research and techs you need to survive, but the goal is to get out and make contacts to get the use of the GLB. This lets you turn off research for a long time to build up cash and forces.