By Chris Rosvoglou Dennis Allen’s coaching staff in New Orleans is starting to take shape. On Wednesday, the Saints announced a plethora of moves to their staff for the 2022 season. For starters, the Saints are retaining defensive line coach Ryan Nielsen and secondary coach Kris Richard. Not only will they keep their current roles with the staff, they’ll both be promoted to co-defensive coordinator. Special teams coach Darren Rizzi will also remain in New Orleans for the 2022 season. He’ll also serve as the team’s assistant head coach. The Saints have also announced that quarterbacks coach Ron…