Hi The Big Fella_08,
You are contacting a law firm tomorrow - Great. That is a good thing. They can better advise you about the AVO than I could.
You can't "press charges" or get a solicitor to "get someone charged"...OK? The cops choose who they charge. You tell the cops what happened (a solicitor can help) , but the cops choose who they charge...that's their job, and they have an obligation to uphold the law. So if A was assaulted, they have an obligation to deal with that...
OK? But:
Have a read about "the decision to prosecute":
Prosecution Guidelines | Office of the Director of Public Prosecutions
3.1 ...he fell over and got scrapes and bruises, but didn't go to hospital...so the seriousness of the assault is a little shaky.
3.13...if the assaulter is found guilty...they probly wont get a conviction recorded and probly just get a small fine.
The kids weren't there, so A went round to cause B trouble (to confront B about leaving the kids unsupervised...that's not A's job, that's better done by cops or Dept Family Services or someone in the government)...A didn't go round to rescue the kids...
Your initial post did not point out that A "lost his nut", then drove to B's property to "confront him" before getting in a scuffle. You need to tell the solicitor you speak to the truth if you want them to do a good job.
Best Wishes,