So, for domestic violence to have any impact on property settlement, you have to prove that it significantly reduced your capacity to contribute to the shared asset pool.
Four incidents in 25 years with no police charges and an AVO not taken out until 2015 isn't terribly persuasive.
Personally, I don't think you have much hope of using this to increase the percentage of your property settlement, but I also think you should rely on your lawyer's advice for this - s/he obviously had more of the story than can be shared here.
When you subpoena for police reports, I strongly suggest asking for reports from the particular incidents in which you were a party. Don't just subpoena for everything on your ex's record. It makes it too easy for him to argue that you're on a fishing expedition, rather than using evidence that is of relevance to you. I can't see why you would have any difficulty getting the reports from 1992.
Four incidents in 25 years with no police charges and an AVO not taken out until 2015 isn't terribly persuasive.
Personally, I don't think you have much hope of using this to increase the percentage of your property settlement, but I also think you should rely on your lawyer's advice for this - s/he obviously had more of the story than can be shared here.
When you subpoena for police reports, I strongly suggest asking for reports from the particular incidents in which you were a party. Don't just subpoena for everything on your ex's record. It makes it too easy for him to argue that you're on a fishing expedition, rather than using evidence that is of relevance to you. I can't see why you would have any difficulty getting the reports from 1992.