Hi Jarrod,
Like your tree and love Red pines, as your tree has very little taper, particularly in the bottom half I would think about Bunjin or literati style with the branches fairly high and pulled down hard. There appears to be a number of branches coming from one point about half way up the trunk which will cause a large bump to develop you should remove most of them.
I have grown a number of RPs over the years, they're great tree but are better in larger tree and in Melbourne prefer to be kept a little drier than Blacks or Whites. Otherwise I agree with the other comments, if the branches aren't where you want them RPs in arch graft quite successfully.
Oscar1