The first rule on the list is intentional masturbation. I could be wrong, but I think that implies even without being mz"l.
If you really want to stay clean, and you know you'll be tested, so don't wait - make plans now. Get out for the evening, get a book from the library, sleep over at a friend's house, go learn in a nearby shul, etc.
What plans can you make to remove yourself from danger - in other words, your current situation, where you'd have to be powerful to stay clean?
To me, the idea of pwerlessness is that I can't put myself into a situation where Ill have to be powerful to succeed.