With nearly one-third of the NFL regular season in the books, the league's 32 offenses have begun to settle into separate tiers.

While some key playmakers such as Andrew Luck and Peyton Manning have found themselves struggling early this season -- which in turn has caused their respective offenses to suffer in result -- other teams have seen some unexpected names rise to the occasion and drive their teams near the top of the standings.

So which teams have enjoyed the most success over the first five weeks of the year to fall into the elite tier of the NFL according to our Net Expected Points (NEP) metrics?