Please, no angels. That sounds really corny, not to mention unnecessary.
However I must mention that I find it poor logic to compare the use of angels with Aslan to angels following Christ around, and conclude that both are ludicrous. Angels
did follow Christ around during His earthly ministry. After He had fasted for 40 days in the wilderness, who ministered to Him?
I doubt that God would send His Son to earth without the proper escort.