So...that was a thing that just happened. Got to the end, got killed. Went back, cleared everything else out, and by the time I got to the final section I had enough wisdom that stage requirements were only 2 to move on. Got to the battle before the final one, popped a wisdom pot to reduce it down to 1 per, and defeated the last monster with the Sword - Judgement skill. Due to it giving 3 victories, it auto cleared the final level and I won.
Nice, it sounds like you have a pretty strong speedrun strategy without even gunning for one!