Risto might help restock the cupboard or give you something to include but Detroit probably won't want him. They might not want Tippett either given his age and contract. If they're trying to stay in playoff position, they also need center, which Flyers obviously don't have.
Michkov or Foerster probably the only names that start a credible package. The equivalent of Alex Tuch in the Eichel deal even if he's not quite Eichel. Barkey maybe but he couldn't be the first piece and you'd be selling low on him if you think he's got a Stankoven-like ceiling
For now, the idea that the Flyers could make the highest possible bid to the point where Detroit also convinces him to accept a trade to Philly is two different layers of unlikely. But that doesn't mean Briere won't try, or be in on others.
As The Athletic article concludes:
Right now, it seems pretty unlikely. But if there’s anything the last calendar year has taught us, it’s how quickly things can change in the NHL with teams and individual star players. If the Flyers offer Yzerman the best package for Larkin, perhaps he could be convinced to move to Philadelphia.
Remember, though, Briere isn’t feeling any pressure to make a deal right now, especially after witnessing the growth of so many of the team’s young players last season under coach Rick Tocchet. It’s entirely plausible that the Flyers will begin next season with a similar roster to the one they iced in the playoffs, with the expectation that those players will continue to grow. The time for taking a big swing isn’t necessarily here just yet.