I might just be bad at math, but I think I've been doing protection wrong. Instead of initially exploring 166 acres, what if I build my lands, then explore 400 acres after all buildings are in? After even 10% mills are in place, I should be able to explore it all in one chunk and not have to deal with the increased explore cost I would get if I started exploring immediately, and I still won't hit the max pop cap at 16 hours if I have draft on the whole time.