The way i see it the Uni power can only multiply the abilities of the host within limits. It itself has limits it couldnt for example bond with a being that was half as powerful as itself and then still go on to multiply the hosts power by 50.
From the showings of the uni-power ive seen, it has never done anything as impressive as the odinpower, unless someone can show me otherwise. On top of that Thor has mastered the power of the runes making him more powerful than his father ever was. I give this to Rune King Thor.
As a side note, where was this 50 figure given anyway?