I would recommend to aggreagte two-three physical interfaces into one logical bond interface. HA or LoadSharing bond that's your choice, but I think 1 Gb/s interface is enough for management usually. Maybe in some cases with very heavily used environments it would be useful to increase maximum speed and for backup purposes.
This bond interface can be used as the main interface for everything, IP address of the bond can be used in the management server object. Physical Mgmt port can be disabled, added to the bond interface or used later for some additional purposes. As Dameon mention, all ports are the same, just Mgmt interface is usually used for initial config with pre-configured IP.