There's no level limit! But my warband is already maximized, short of every soldier having a magic item. Fighting two warbands at once would lead to my immediate defeat, since numbers count in this game! Also, the levels I spent on improving 'write scroll' probably shouldn't count, since I've written a total of two scrolls so far.
Yes, it would be nice if all my out of game spells succeeded at once!
I did suggest my opponent take some extra EXP from the game. I'm not sure if he actually did.
I think I'll start again as a chronomancer. Unless someone agrees to play my high-level band again next time!