Anhedonist

Hi. I need some advice on which route to take to be able to play the future map packs because I don't want to waste money of course. I have two options....I am in the UK on an NTSC console and I have both an xbox live gamertag set up in Canada and one in the UK, however I play mainly on the Canadian one because I am moving back soon. Should I buy points for the UK account , download the maps, and then transfer to the Canadian account? Would that even work? Or vice versa can I just buy the maps on the Canadian account using a points card? Does anybody have experience with this? I would love to know which way works if any, thanks.