Hokage does not mean a whole lot anymore once shippuuden started....but to answer the question:
Yeah he knows a lot of jutsus....plus he cares for the village.....so my vote is that he is at Hokage lvl, but if he was to be Hokage he would be the weakest Hokage EVER from any village. Sad but true.....I do not even see the Third losing to him at his old age...if he was alive......
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