I would highly recommend porcupine trail to north dome, but I would advise bringing plenty of water (I drank about 3L) and taking it slow if you are not used to elevation. I had a noticeable headache after hiking, most likely related to the elevation. Of course I had taken my ibuprofen out of my hiking sack the week prior, but Alex swooped in for the rescue and was able to provide me those sweet, sweet drugs.