OP: Why are you looking for heteirim? The halacha is to get drunk. Unless someone is physically ill or unable to get drunk, he should get drunk on Purim until reaching the state of ad dlo yoda.
Of course there are heterim like going to sleep, etc. (And, really, do you know anyone who didn’t get drunk that went to sleep on Purim day? Ah nechtinge tug. They don’t go to sleep Purim afternoon.) But why look for heteirim? Do the mitzvah as it should be done, as Klal Yisroel has done it for thousands of years, and how the vast majority of poskim have ruled over the centuries.
L’Chaim!