I disagree about the better outcome. Rahimi was a near unanimous decision. Even the sole dissenter, Justice Thomas, agreed with much of what the majority concluded. He simply disagreed with the majority on a very narrow point about the historical analogues being sufficient to uphold the statute in question. Justice Thomas is the absolute most pro-2A on SCOTUS. He was of a similar mind as the rest of the court, meaning a different plaintiff wouldn’t have made a real tangible difference here.
The thing that you also have to keep in mind, and is another reason I disagree about a different outcome, is that conservatives actually are typically harder on crime than liberals and they hate criminals. Therefore, in a conservative majority SCOTUS, I think these prohibited persons cases are actually not the best cases for us in the 2A movement to be litigating right now, even with supposedly sympathetic plaintiffs like Range and Daniels. We should be focused on other cases with absolutely unquestionable plaintiffs. I’m talking things like AWBs, age restrictions, sensitive places, ghost guns, etc. Cases where the character of the plaintiff is not in question and the court can focus instead on the conduct itself.