So here's my thoughts:
There's two ways to go:
1.) Early rush on Giggles.
2.) Focus economy and tech to Construction+IW for a sword+cat war (IF we have iron).
Unfortunately our land is not that great for an economy. We have some cottage land but not enough happiness to work a lot of it. Meanwhile we know Gilga has gold in his BFC to tech ahead fast. Some people have also mentioned specialists, but again we don't have a ton of happiness so our cities will be small. So I think we'll fall behind on tech quickly UNLESS we have the GLH. But since many people seem to dislike that, I think the only good option remaining is to rush Giggles.
Thus, when looking through the saves, my requirement is that copper must be hooked up (or close at least).
3 points -
Gumbolt - Nice choke. Settling 5th city would hurt more than help, as we already have cities working unimproved tiles. With Ikhandas in all cities and granaries in two, this has best infrastructure to build/whip an army. Combined with a choke to slow Gilga+deny copper and two stolen workers this probably has the best chance for a successful rush. Particularly with Gila's city setup in this save, even if we just take Uruk we can get an awesome city (serious production and the gold will pay for itself) without having to worry about cultural pressure (in other saves he has a city to the north which would encroach on Uruk).
2 points -
Kossin - Nice setup for rush. Ikhanda in all 3 cities with 2 axes, 1 impi and more on the way. Should be teching writing not myst though. Copper city is in a lousy location but oh well. Best capital location (and lets me try to build the GLH

)
1 point -
Huerfanista - Stonehenge is nice to have, though far from critical. Has "best" location for copper city, however copper is not connected and won't be for a while. Severe lack of workers. Would have to be a late rush.