>>534720946
Bats have made it reasonable to build copper roads. I almost never go above thr basic ones unless I get a large surplus of stone from cornerstones or something, much less copper, which is more valuable as bars. But there were games I played where bats got up to 6+ on copper mining from cornerstones that came from bat orders. On top of them having a high chance for doubling. It's not unusual to end up with hundreds of excess copper