Doubtful... I tried starting a playthrough with a paladin with all the +XP per battle items and getting learning lvl 3 (through quests that do not involve fighting), which amounted to about +50% per battle on impossible right from the start and got to lvl 58 + about 1/4 to lvl 59.
So I'm inclined to thing that lvl 59 or more is not exactly possible.
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