What would be the safest, not-cheesy way to level grind in a sand-box like setting?

[Maat Mons]

Um... no? Say there's just 2 of one race, "Adam" and "Eve". Adam's build can Survival to feed 2 people, Eve 1. Even at level 999,999,999,999.

Why wouldn't the level 1 trillion minus 1 character have a higher Survival modifier? They have lots of skill ranks to throw around, and a very high skill cap. Every +2 to Survival is another person feed with the same time expenditure.