Try PTE. Writing is much easier there. You will be surprised how much you get there.
This might help: http://www.expatforum.com/expats/12015801-post16349.html
The 5 Australian study points is quite detailed but if you studied in Australia in a 2 years degree or such, then you can claim it. Have a look: https://www.border.gov.au/Trav/Work...l-Skilled-Migration-applications/2-year-study
Also, is your skill in MLTSSL ? Else you will need a state nomination for PR invite.
https://www.legislation.gov.au/Details/F2017L00850