Choosing to use a team hierarchy is kind of an alternative to just using adding members to the project without using teams.
When constructing a team hierarchy the team hierarchy would have admins at the top level and add less powerful users in sub levels of the hierarchy from what I have read.
So should an 'Admins' group be created one level down from the project area for the admins and then add other groups below that or can the admins be added directly at the default top level and then have other groups directly below the top level?