It is extremely hard to find any team that can play 3 players who shoot any volume at above a 40% clip. Honestly, I think you'd really have to search to find a team that could realistically do that. And my guess would be you're looking at the deep mid majors or you're having fun with the numbers (ie I just looked up STJ and we could roll out Stanley, Mathis, and Storr but it goes against the spirit of what you are suggesting).
What would be fantastic and what we lacked, was 3 starters who could shoot at a consistent at least 35% clip within BE play. That would open up a lot of room for Joel and create driving lanes. As AJ plays more and gets used to the speed of the BE on defense (or potentially bulks up a little if he wants to play more of the 3) he'd could be an key cog in your plan. It also highlights a weakness in Posh's game, because the defense can take a step and a half back and take aways Posh's two most potent offensive weapons, driving to hoop or passing to Joel. I guess what I'm saying is if we have 3 starters or even 2 starters and a sixth man that have the athleticism to compete in the Big East and shoot 40% from three everyone guaranteeing a final four next year would be right.
If we find those guys in portal, I'll still be bummed about losing some old favorites, but that feeling will easily be tempered by march of next year.