VIC State Nomination 489 visa - Family sponsored

hi can anyone share any websites with tips beyond the standard requirements listed in department of immigration website?

for example,I have an aunt in melbourne, i have searched apparently the whole of victoria qualifies as a designated area.

my aunt also qualifies as a eligable relative, but my question is what documents will i require to prove the relationship with the aunt?

my birth certificate? and im assuming my mom and aunts birth certificate?

finally i currently have 70 points with language, skills spouse etc, this will take me to 85 points with family sponsorship.

will 85 points for an ICT profession be enough with family sponsorship in this visa stream?
based on experience?