So you've done the Eternal Tower three times (or at least I have anyway) on all difficulties from start to finish and don't want to do it again...but perhaps there's a weapon or rare mag soul you want that only the Eternal Tower drops. I say, do an abridged run. I mean run the tower until you get to level 10 and defeat the first mother or until you're sick of it altogether and retire. You'll eventually get what you want if you do enough abridged runs. It works for me. I got the Emperor Axeon I wanted for my FOmarl from using this method these past couple days. And this concludes another PSZ tip of the moment.