The horseman near Cha Ching is not a significant threat. We'll move the spear from Zhi Gang to defend that town, temporarily leaving that town undefended.
Shen Ling should have been micromanaged for max growth so that it would grow back to size 5 in 2 turns, but there's no real harm done. For peace-keeping purposes, I'd either see about building another warrior quickly or moving the spear back to help defend, preferably the warrior option as it will allow our spear to escort our settler all the way to it's destination.
As far as GCA is concerned, we will eventually have to ask him to move, but it may come after we settle that town, placing the iron within our cultural borders. I'd suggest that once our settler is about 2 tiles away, if he's still parked there, we simply inform him that he has 2 turns to withdraw. But before doing so, we must have a warrior on the tile destined to hold our newest town so that they cannot prevent us from settling there.
