The Bengals employ big maulers up front on their offense and the starters are one of the strengths of the deep roster. However, it's their usage of jumbo packages that makes them one of the more potent units in the league.
Some NFL teams value skill positions higher than others in the league, but the key to a solid offense is building a stout offensive line. Sure, getting an able quarterback is the utmost priority, but the ability to keep him upright is what sustains signal-callers' careers.
A big facet correlating to the Cincinnati Bengals' renaissance under Marvin Lewis has to do with the building of formidable offensive lines.