"Well, in my experience, you'll primarily want to manage resources on the road. Scavenge through ruins, be mindful of hidden traps... If you're adept at survival, which I assume is a necessary skill during an invasion, then you'll be one step ahead of the others."

Then again, what does he know? Akechi's not the one who lived through the invasion, but if nothing else, it must require quick-thinking and adaptability.