Hi. I'm also a nurse from the Philippines.
We have the same plan. my agent told me the exact same thing. I thought about taking the aged care cert 3 course as my plan B, if ever that I could not get all 7 in my IELTS. However, after reading endless threads and forums as well as the advice given to me by our fellow nurses; I believe that obtaining a student visa and opting for the Bridging program is the best idea if one wants to work in Aussie. It can be a huge risk, when it comes to the financial aspect as well as the depressing thought of going back to your homeland if no one will sponsor you.
I think we better get as much clinical experience here in our local hospitals before applying for the bridging program to be sure. That way, showing that we are competent can lead us to employment.