Looking at the players representing nigeria at Russia 2018, i think the best formation that will suit our players and bring out the best in them without exposing us to conceding too much goal is the 352 formation. Coach gernot rohr should go with the 352 formation and this line up; Ighalo upfront because he has the physicality to trouble opposing defence and can hold the ball and bring others into play and Victor Moses closely behind in the free role because he is the most skillful player in our team and should not be restricted.
The wing backs position should be occupied by Idowu in the left wing back and Ebuehi in the right wing back. Truth be told these pair are more in form than Elderson Echiechile and Shehu abdullahi. Especially Ebuehi, his overlapping runs and pull out is very brilliant and miles better than that of Shehu and he is more experienced. Based on current form from the friendlies, there is no way Ebuehi should be on the bench for Shehu.
The midfield should be Iwobi, Mikel and Ndidi in addition to the wing backs it becomes a 5 man midfield when attacking with iwobi playing the box to box role and Mikel sitting deep to spread passes and Ndidi playing a little advance but not as Iwobi.
The defence should Balogun, Ekong and Omeruo. With Ekong being the sweeper and ball playing center back. I picked Omerouo because of experience of playing at this level before.So it should be something like this

Ighalo
Moses

Idowu, Iwobi, Mikel, Ndidi, Ebuehi

Balogun, Ekong, Omeruo

Musa and Ihenacho can come in for Moses and Ighalo in attack the 2nd half, while Etebo and John Ogu can come in for Mikel and Iwobi in midfield, while Shehu can come in for any of the wing back roles or in defence for Omeruo.
If we adopt this formation we will be difficult to beat. And lets face it, we don't have the attacking players to play the open 433. In Euro 2008 Greece didn't have the attacking might to go toe to toe with the big guns, they simply adopted the conservative approach thereby shocking the big guns with 1 nill defeat on the way to winning the Euros beating countries like Spain, France, Portugal. I'll love to see and under dog do what Greece did in this world cup. Super eagles can follow suit. I don't mind the football being boring as long as the super eagles win the world cup. Lol.