Most Uni's will allow you to apply ad a mature age applicant without year 12 if you are over a certain age or have been working for a set period of time. You will find, however, that you will most likely have to do a bridging course to help ease you into the academic requirements of Uni. I think they go for about 3 months and are usually done over Summer but don't quote me on that!

The best thing to do is to contact the Uni you'd like to apply to and ask them. Keep an eye out for Uni open days as well.

I'm not sure if they still do it, but I remember a couple of Uni's were also doing the combined degree for a while (4 years in total an you had to do two graduate years).

If you want both nursing and mid qualifications, keep in mind that if you do nursing first, post grad mid is only 1 year. If you do mid first, post grad nursing is 2 years at most Uni's.

Personally, I feel that having both qualifications makes you more employable. It also gives you more options if you want to change direction later.