Loreangelicus, that is a good question. I think it is possible to hit 61, if you have enough AK scrolls. I made the mistake of using them on the tougher islands against regular armies and for a while, I wasn't sure I'm going to cut it. The biggest bonus AK scroll provides is vs. heroes and vs. bosses. Even on Reha, with full +xp items (that amounted to +62% XP per battle), the regular armies provided up to 6-9k at most XP.
So the bottom line is, leave stacks of heroes available (if necessary, don't kill them in the first run through a territory, but do check in advance how much XP are they worth and reload if the result is not satisfactory) and when you do the second run, slap an AK scroll on and beat them up one by one. That may provide the experience you need to get to 61. You should, of course, check the XP the heroes will give you after the fight. If it's over 9k, you're on the right path. If not, the extra AK scrolls will serve you better against regular armies on Reha.
Oh, an of course, stock up on items that quickly lose morale for extra XP through suppressions. Steam Armor and Paladin shield are a good example.
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