He was probably against a 10/10 Indian rush. Which would basically mean 10 Sepoys would wreck a Cetan Shipment + Warhut, and if you're lucky +5 Cetans, and since Sioux don't have Minutemen...
Bowriders would be too late. You wouldn't even get 5 out, let alone get the stable up before he's in your base.
You can always try the cheese 10 pistolero outlaw strategy thingy. You're going to have to search it on Age Community, or wait for someone to write a BO on how to do it. Basically you send 10 pistol outlaws for 500 coin upon hitting age 2. Age with 500 food, gather 200 wood as well during age up time, and build a stable, and try to pump 5 bows while also making villagers. It's important to continue playing and building an economy and military. Getting the 10 Pistols out doesn't mean hes just going to quit.