Either way, by the first person he'd absorbed, he'd have a form of omniknowledge, which is Goddmodding. Doesn't matter if he cant easily access it, the fact is that he actually CAN.
Plus, what of the possibility of another of him fighting off the him that tries to absorb the others, or a him that has the arm but decides against absorbing the others? If he went to absorb every other one of him, he'd be on a endless journey, as there is a endless number of possibilities. Unless, of course, he absorbs them all at once, to which he'd also absorb himself and thus delete himself from existence.