Immigration law, student visa, employment visa, partner visa
[QUOTE=Seva] there is an outstanding warrant for me, for assault charges from 2008 (thats the reason i went overseas in 2009).[/QUOTE]
Regardless of you becoming a sponsor or not, your outstanding warrant remains....when you return to Australia & come to the attention of authorities, you may well be arrested on the spot..
Given the assault charges relate to domestic violence, I would be surprised that you would be considered as a suitable sponsor.
You need to address the historic assault charges to move forward IMO