Damn, I've been sleeping on Ayamara. Chasqui after the shipment are quite good for a no pop unit. However they can only be trained from the TC. So your eco will suffer.
Note after testing : a big XP treasure massively helps. If you can't find that, assign vils in transition to age 3 to make sure you have a shipment once you have aged up.
They also can be trained from the Trade post.
Since there is Priestess XP dance, It is thought that XP is not a problem.
Thank you for Testing.
After further testing : in transition to age 3 you can put more villagers on the plazza to ensure you have a shipment once you reach age 3. In transition you just need to collect enough to pay for the tc big button and then remacro to train chasquis.
In age 3 you are pop capped so the build turns into some kind of all-in where the TC produces chasqui and you don't collect food anymore.