good evening...edo tensei nagato is a wind attribute unit so he will be surely having benefits from breeze dancer and gaara....and he is a great support for edo tensei units....with such a formation he will be serving minato as a support i think...he can. also be useful on specific battle situations ...for an example when you encounter red hot habanero kushina team.. if they will aim at minato and cause a dangerous debuffs on him nagato will be here to save him from those serious debuffs...nagato can be a threat by himself i think...because he can drain chakra with his standard attack and also with a chance to cause chaos to none immune units...he can be a problem of course..but he can be giving you a better result if you will manage on reaching him to 4 stars..on 4 stars his power potential reach a dangerous level surely....he can earn the talents which it can make him either a better support..or to become a deadly attacking unit...hope this help on making your decision....best of luck