Only because this sounds interesting:
if touma is really cloned, can it happen that IB will change its host?
if it choises his host after effectiveness, a military trained 21 years old touma would be way stronger than a 16 years old highschool boy
therefore: would touma loose his powers? Can it be that IB jumps between original and clone vessel, until one prooves his superiority over the other one?
[ only a idea for a fanfic
]