Congrats! Full BT Edo Nagato either takes a ton of patience or vials, so either way, nice. The thing is, Nagato is more of a support type ninja, best in pos 2-3. Depending on which other ninjas you have, the best teams will be different. But generally he works well with other Rinnegan units, either to have them support him if you do want to run him pos 1 or to for him to support them.

Example of the first type of team:

This works best if you also have BT on Ningendo and Gakido, like Gakido's Y+1 mystery that can reduce Nagato's cooldown in round 2.

Example of second type of team:

This works best when you have Rinnesasuke with his BT, too.