I regularly use Apostles with only one charge left to explore the map.
Especially ones with the +20 theological combat promotion and the Martyr promotion.
They dont have to acknowlege borders so you can basically explore the entire map.
Also the AI is EXTREMELY reluctant to do theological combat on a unit that has the +20 promotion (cant remember what it is called) something like great speaker or something. But the AI knows they have this promotion and will basically allow you to walk through their lands unmolested like this allowing you to explore the entire map if you like.
I like to send out several of these units after expending all but their last charge.
Especially ones with the +20 theological combat promotion and the Martyr promotion.
They dont have to acknowlege borders so you can basically explore the entire map.
Also the AI is EXTREMELY reluctant to do theological combat on a unit that has the +20 promotion (cant remember what it is called) something like great speaker or something. But the AI knows they have this promotion and will basically allow you to walk through their lands unmolested like this allowing you to explore the entire map if you like.
I like to send out several of these units after expending all but their last charge.